YouTube Shorts and Facebook video share a 9:16 vertical canvas, but almost everything else about the two surfaces pulls in opposite directions. Shorts are indexed by YouTube’s search engine and rewarded for watch-through; Facebook distributes video through social sharing, reactions, and a Reels tab whose length cap varies by account and is far shorter than Shorts’ 3-minute ceiling (extended from 60 seconds in late 2024). A Short that fits cleanly on Instagram Reels — same spec, same 3-minute cap — may need a different treatment for Facebook.
The metadata translation is the deeper shift. A Short lives on a title of up to 100 characters and a description of up to 5,000 characters structured for search — chapters, timestamps, related links. Facebook replaces that with a single caption that can hold up to 63,206 characters but truncates in the feed after a few lines with "See more", and a hashtag culture so thin that one or two at most reads native. Rewriting for Facebook means stripping the search scaffolding and leading instead with a hook that earns a share.
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Everything that changes between the two composers, side by side.
| Spec | YouTube Shorts (from) | Facebook (to) |
|---|---|---|
| Primary canvas | 1080 × 1920 px · 9:16 (shorts) | 1080 × 1920 px · 9:16 (story) |
| Caption limit | Title 100 characters · description 5,000 characters | 63,206 characters (feed truncates after a few lines with “See more”) |
| Video length | Shorts up to 3 minutes (extended from 60 seconds in late 2024) | Long feed uploads supported (hours); Facebook Reels are far shorter — check the composer for your account’s cap |
| Hashtags | Hashtags go in the title or description; #shorts is no longer required for classification | Supported but lightly used — one or two at most reads native on Facebook |
| Metadata structure | Separate title (100 characters) and description (5,000 characters) fields, structured for search | Single caption up to 63,206 characters; feed truncates after a few lines with "See more" |
| Hashtag norms | Hashtags in title or description for classification; #shorts no longer required for Shorts tab | Supported but lightly used — one or two at most reads native on Facebook |
| Distribution mechanism | Search index, Shorts shelf, and subscriber feed — discovery is largely algorithmic and search-driven | Social sharing, reactions, and the Reels tab — reach scales with engagement, not keyword match |
The good news
The fine print
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Tip 1
Lead with the share trigger, not the premise: Facebook’s algorithm rewards content that earns shares and reactions quickly. Rewrite the first line of your caption as something a viewer would want to send to someone — a surprising fact, a relatable moment, a strong opinion — rather than a YouTube-style "in this video I show you."
Tip 2
Use feed video as a fallback for longer Shorts: if your Short is close to 3 minutes and your account’s Facebook Reels cap is shorter, upload as a standard feed video. Feed videos can run far longer and still surface in followers’ timelines, and a longer watch time can signal quality to Facebook’s ranking system.
Tip 3
Keep audio original if possible: if any part of the Short’s soundtrack comes from YouTube’s audio library, confirm you have rights to use it on Facebook or swap in a royalty-free alternative before publishing — what’s licensed on YouTube is licensed for YouTube.
FAQ
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Both are valid, and the answer depends on length. Facebook Reels have a length cap that varies by account — check the Facebook composer to see your ceiling. If your Short fits, a Reel gets placement in the Reels tab alongside Facebook’s short-video feed. If it’s too long, upload as a standard feed video, which supports much longer runtimes and still reaches followers in their timeline.
No. The #shorts hashtag signals to YouTube’s algorithm that a video should be classified as a Short — it has no equivalent meaning on Facebook. Facebook’s own norms make one or two contextually relevant hashtags the sensible ceiling; pasting a full list of YouTube tags reads as spam and won’t drive discovery the way YouTube’s classification system does.
Shorts run up to 3 minutes (extended from 60 seconds in late 2024). Facebook Reels are far shorter — check the composer for your account’s current cap, as Meta has not published a single fixed number that applies to all accounts. A Short right at the 3-minute mark may need to be trimmed for Reels or posted as a feed video instead.
Facebook has no title field for video — the Short’s 100-character title simply disappears. The description, which can run up to 5,000 characters on YouTube, collapses into a single Facebook caption that truncates in the feed after a few lines with "See more." Move the title’s job into the first seconds of footage or the opening sentence of the caption, and rewrite the rest for social sharing rather than search.
Compose once, customize the caption per network, and let SocialKit publish to YouTube Shorts, Facebook, and 9 more platforms on schedule — no re-uploading, no copy-paste.
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