LinkedIn Video Specs 2026: Complete Guide for Every Post Type

LinkedIn now has over 1 billion members, and video is its fastest-growing content format. According to LinkedIn's own data, video content generates 5x more engagement than text posts — but only when you get the technical specs right. Upload a video with the wrong dimensions or file size, and LinkedIn either rejects it outright or compresses it into an unwatchable blur.

B2B sales teams, marketers, and content creators all need different specs depending on what they're posting: native feed video, direct message video, Sponsored Video ads, Thought Leader Ads, or the new vertical video feed that LinkedIn launched in 2024. Each has different file size limits, aspect ratio requirements, and duration rules. This guide covers all of them, updated for 2026.

Whether you're optimizing cold outreach videos for LinkedIn DMs, running video ad campaigns, or experimenting with the new short-form vertical feed, these are the exact specs you need — pulled from LinkedIn's official documentation.

LinkedIn Video Specs at a Glance

LinkedIn has five distinct video formats, each with different technical requirements. Native video (posted to your feed or sent in DMs) is the most flexible: it accepts almost any file format and allows files up to 5 GB. Video ads are significantly more restrictive: MP4 only, 200 MB maximum. The new vertical video feed and Thought Leader Ads each have their own nuances on top of these base requirements.

Use this quick-reference table to find the right spec set before you start editing:

LinkedIn Native Video Specs (Organic Posts & DMs)

LinkedIn native video — video you upload directly to a feed post or send in a direct message — supports the widest range of formats and the most flexible size limits of any LinkedIn video type. You can upload nearly any common video format up to 5 GB, and LinkedIn will process it server-side. For B2B sales teams recording personalized outreach videos or product demos, this flexibility means you rarely need to re-encode before uploading.

Here are the complete specifications for LinkedIn native video, sourced from LinkedIn's official help documentation:

Native Video for LinkedIn DMs

Video sent in LinkedIn direct messages uses the same technical specs as organic feed posts. The 5 GB file size limit and 10-minute duration cap apply in DMs. For LinkedIn video prospecting, keeping your outreach videos under 90 seconds dramatically improves watch-through rates — prospects are more likely to watch a short video to completion than a 5-minute walkthrough.

If you're sending personalized videos via Sendspark's LinkedIn integration, the videos are hosted on Sendspark's CDN and delivered as a clickable thumbnail link in the DM — meaning LinkedIn's native DM upload limits don't apply. Your prospect clicks the thumbnail and watches on a branded Sendspark landing page, where you get full video analytics on open rate, watch time, and CTA clicks.

Why Caption Files (.srt) Matter

LinkedIn supports .srt caption file uploads for native video. This matters because muted autoplay is the default behavior on LinkedIn — your video starts playing silently as members scroll their feed. Without captions, a large portion of your audience will scroll past before they hear what you're saying. Adding a caption file (.srt) ensures your message lands even on silent playback. For more on writing captions that actually drive engagement, see our guide on adding video captions that boost sales engagement.

LinkedIn Video Ad Specs

LinkedIn Video Ads (Sponsored Content) have stricter requirements than native posts. The format is limited to MP4 only, and the maximum file size drops from 5 GB to 200 MB. LinkedIn uses these limits to ensure smooth delivery across its ad network. You'll also have three aspect ratio options — 16:9 landscape, 1:1 square, and 9:16 vertical — each with specific pixel dimensions you must stay within.

Thought Leader Ads

Thought Leader Ads are a LinkedIn ad format launched in 2023 that lets brands amplify employee or executive personal posts as paid ads. Instead of creating a separate branded ad, you sponsor an existing organic post from an individual LinkedIn profile. For video, this means your sales leader's authentic product demo or customer story can become a Sponsored ad — reaching beyond their followers while retaining the personal, non-branded feel that performs better with B2B buyers.

The video specs for Thought Leader Ads match the organic native video specs (not the stricter Video Ad specs) because the source content must already be a live personal post. The underlying video file can be up to 5 GB, 15 minutes, and in any supported format — but the final published post's video must comply with organic native video specs. LinkedIn's official guidance on Thought Leader Ads is available via the LinkedIn Marketing Solutions resource hub.

Connected TV (CTV) Ad Specs

Connected TV ads are LinkedIn's newest video ad format, reaching LinkedIn members on streaming TV services and smart TVs. CTV ads use the same LinkedIn audience targeting (job title, company, seniority) but deliver in the living room. The CTV ad specs are more specific than standard video ads:

• Format: MP4 with H.264 video encoding
• Aspect ratio: 16:9 landscape only (no square or vertical)
• Resolution: 1920×1080 recommended
• Duration: 15–30 seconds recommended (up to 30 minutes technically allowed)
• Audio: AAC-LC, stereo, 48 KHz sample rate
• File size: Under 200 MB
• No click destination: CTV ads are non-clickable (TV remote can't click); use for brand awareness, not direct response

CTV ad specs represent an entirely new content format — the short-form, non-clickable nature means you need to make your brand message land in the first 5 seconds without relying on a CTA click. This is a fundamentally different production approach from standard LinkedIn video ads.

Vertical Video on LinkedIn: The 2026 Algorithm Shift

LinkedIn launched a dedicated short-form vertical video feed in 2024, and it changed how the platform distributes organic video content. The vertical video feed is a full-screen, scroll-up-to-advance experience — similar to TikTok or Instagram Reels — accessible via a dedicated video discovery tab in the LinkedIn mobile app. Native vertical video (9:16 aspect ratio) uploaded directly to LinkedIn now receives significantly more organic reach than landscape or square video, because LinkedIn's algorithm actively surfaces vertical video in this dedicated feed alongside regular feed distribution.

This is the single biggest change to LinkedIn video since the platform first enabled native uploads. If you've been producing all your LinkedIn content in 16:9 landscape and wondering why reach has declined, switching even a portion of your output to 9:16 vertical will materially change your results.

Vertical Video Specs for the LinkedIn Feed

Why the Vertical Video Feed Changes the Reach Equation

The native video algorithm boost for vertical content works through two mechanisms. First, vertical videos uploaded natively appear in both the regular LinkedIn feed and the dedicated video discovery tab — effectively doubling distribution touchpoints. Landscape videos only appear in the main feed. Second, the video discovery tab's full-screen experience encourages more scroll time, which LinkedIn's algorithm interprets as engagement, compounding the reach advantage.

For B2B sales teams, this means short-form vertical video — filmed on a smartphone in portrait mode — is now worth adding to your LinkedIn content mix even if your team has never made vertical video before. A 30-second "here's what we noticed about your company" clip shot vertically on an iPhone outperforms a polished 3-minute landscape demo in terms of organic reach and profile views driven.

AI-Generated Content Disclosure on LinkedIn

As of 2024, LinkedIn requires AI-generated content disclosure labels for videos that are substantially or fully created by AI — for example, synthetic presenter videos where no real human appeared on camera, or AI voice cloning used without any underlying human recording. This is a meaningful distinction from AI-assisted editing (which does not require disclosure). LinkedIn's policy is part of a broader effort across social platforms to label synthetic media transparently. If you're using Sendspark's AI personalization features, which use your own voice and video (the AI personalizes the greeting using your cloned voice), no AI content disclosure is needed because the original content is human-recorded.

Mobile-First Production for Vertical Video

Filming vertical video for the LinkedIn feed requires a different mindset than recording a desktop screen share. Keep your subject centered in the upper two-thirds of the frame — LinkedIn overlays the post copy and engagement buttons at the bottom. Shoot in a quiet, well-lit environment, and speak directly to the camera from 18–24 inches away for the authentic, direct-to-person feel that performs best in the vertical video feed. If you need to compress the resulting file before uploading, VLC Media Player handles fast compression on both Mac and Windows for free.

LinkedIn Video Best Practices for B2B Sales Teams

Getting the technical specs right is necessary but not sufficient. LinkedIn's algorithm also rewards watch time, completion rate, and early engagement (comments in the first 30 minutes). These best practices are the highest-leverage things B2B sales teams can do to improve LinkedIn video performance across every format — organic posts, DMs, and video ads.

According to LinkedIn's official video best practices, videos under 30 seconds see the highest completion rates, while videos in the 2–5 minute range see the highest engagement rates for thought leadership content targeting decision-makers.

Always Add Captions

Add captions to every LinkedIn video, without exception. According to LinkedIn's own data, 80% of video on LinkedIn is watched without sound — muted autoplay is the default behavior when members scroll their feed. Without captions, your key message may be completely missed. Upload a .srt caption file when posting natively, or use LinkedIn's auto-captions feature and edit for accuracy. Our detailed guide on writing video captions that boost sales engagement covers pacing, line breaks, and on-screen emphasis techniques that make captions work harder.

Optimize Video Length by Goal

Different video goals call for different lengths. Awareness content — brand intros, quick value props, thought leadership takes — performs best under 30 seconds in the feed. Thought leadership pieces and in-depth industry analysis work in the 2–5 minute range for engaged audiences who've opted in. Product demos and walkthroughs can run 5–15 minutes when sent as follow-up via LinkedIn DMs to prospects who've already shown interest. Avoid posting 10-minute demos to your feed — they're designed for direct messages, not cold audiences.

Use Custom Thumbnails for Video Ads

LinkedIn Video Ads autoplay silently in the feed, but the thumbnail appears before the video starts — and when auto-play is blocked. A custom thumbnail (JPG or PNG, max 2 MB, same aspect ratio as your video) that shows a clear visual — a person's face, a bold graphic, or a product screenshot — consistently outperforms auto-generated thumbnails. Always include a text overlay on your thumbnail image so the viewer understands what the video covers even before it plays, since LinkedIn's muted autoplay means the first second may pass before the viewer realizes video is playing.

Personalized Video for LinkedIn DMs

The highest-performing use of video in LinkedIn outreach is the personalized video DM — a short video where the first 5–10 seconds reference something specific to the prospect: their company name, a recent news event, or their website shown as the video background. Sales prospecting teams using Sendspark's AI-personalized video intros record a single base video and let Sendspark's AI clone their voice and generate a personalized greeting for each prospect — including showing each prospect's website as a dynamic video background. This delivers video personalization at scale: one recording, hundreds of personalized versions, with each prospect receiving a video that feels individually recorded.

The result: sales teams using this approach see 2–3x higher reply rates versus standard video messages, and 40–50% more meetings booked compared to text-only outreach sequences. For more on this workflow, see our full guide to LinkedIn video for B2B sales.

LinkedIn Live Streaming Specs

LinkedIn Live allows you to stream live video to your audience via third-party streaming software (OBS, StreamYard, Restream). The technical requirements differ from uploaded video:

• Protocol: RTMP
• Bit rate: 192 Kbps minimum to 30 Mbps maximum
• Recommended video resolution: 1080p (1920×1080) at 30 fps
• Aspect ratio: 16:9 landscape only
• Audio: AAC, 128 Kbps minimum
• Eligibility: Your LinkedIn Page or profile must meet LinkedIn's Live eligibility criteria (minimum follower counts apply) — see LinkedIn's Getting Started guide for current requirements

Video Compression Before Upload

If your video file exceeds LinkedIn's size limits or is taking too long to upload, two free tools handle compression reliably:

• VLC Media Player — Free, available on Mac, Windows, and Linux. Use the Media > Convert/Save function to re-encode at a lower bitrate while keeping the original resolution.
• HandBrake — Free open-source transcoder. Use the "Web" preset with H.264 encoding and RF 20–23 for a good quality-to-size balance. Handles batch processing for multiple files.

LinkedIn Video Specs: Complete Comparison

Before the FAQ, here's a consolidated comparison of all LinkedIn video types side by side — useful if you're choosing which format to use for a specific campaign or content goal:

Frequently Asked Questions

How do I post a video on LinkedIn?

To post a video on LinkedIn, click "Start a post" on your LinkedIn homepage, then click the video icon (or media icon) to upload a file. LinkedIn accepts MP4, MOV, AVI, and most other common video formats up to 5 GB. After uploading, add a caption, select a custom thumbnail if desired, and optionally upload a .srt caption file before posting. The video will process for a few minutes before going live.

How long can LinkedIn videos be?

LinkedIn native video can be up to 15 minutes when posted from desktop, or up to 10 minutes from mobile. LinkedIn Video Ads can technically run up to 30 minutes, though LinkedIn recommends keeping ads under 30 seconds for awareness campaigns. For the vertical video feed, the maximum is 15 minutes but the sweet spot for engagement is 15–60 seconds.

Do LinkedIn video ads autoplay?

Yes, LinkedIn video ads autoplay silently in the feed — just like native videos. Muted autoplay is the default behavior on LinkedIn across both ads and organic posts. This makes captions essential: if your ad's message is entirely delivered by voice without on-screen text or captions, most viewers will scroll past without understanding what the ad is about. Always add a .srt caption file or burn captions directly into your video ad.

What is the best aspect ratio for LinkedIn video?

For organic native video targeting a general professional audience, 16:9 (1920×1080) landscape remains the most broadly compatible format. For the vertical video discovery feed and mobile-first content, 9:16 (1080×1920) now gets significantly more reach. For LinkedIn Video Ads, square 1:1 (1080×1080) often outperforms landscape in the feed because it takes up more vertical screen space. Test all three and use the LinkedIn campaign analytics to see which drives the best completion and click-through rates for your audience.

Can you post videos in LinkedIn DMs?

Yes. LinkedIn allows you to send video directly in direct messages (DMs). Native video in DMs follows the same specs as feed posts: up to 5 GB, 3 seconds to 10 minutes, in any supported format. Alternatively, tools like Sendspark let you record and send personalized video messages on LinkedIn as clickable thumbnail links, with analytics tracking who watched and for how long.

How do I add captions to a LinkedIn video?

LinkedIn supports two methods for adding captions to native video. First, when publishing a post, you can upload a .srt (SubRip) caption file alongside your video file — LinkedIn will sync the captions to the video automatically. Second, LinkedIn offers auto-captions generated by its speech recognition system; after uploading your video, you'll see an option to enable and edit auto-generated captions before posting. For video ads, captions can be baked into the video file or uploaded as a separate caption file during ad creation in Campaign Manager.

What LinkedIn video format gets the most engagement?

According to LinkedIn's video best practices documentation, native vertical video (9:16, 1080×1920) now gets the most organic reach due to placement in both the main feed and the dedicated video discovery tab. For engagement rate (comments, shares, reactions), short-form videos under 60 seconds with captions, a visible speaker, and a specific insight or point of view in the first 3 seconds consistently outperform longer, more produced content. Native uploads always outperform external video links in terms of organic distribution.