Automatically Post Facebook Reels To YouTube Shorts
PostOnce can use an eligible Facebook Reel as the source and publish it to YouTube Shorts, so you can post the video without downloading and uploading it again.
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Video Tutorial
Watch: How to Auto Post Facebook Reels to YouTube Shorts
See how to connect Facebook as the source and YouTube as the destination, then create a PostOnce workflow that publishes eligible new and existing Facebook posts or Reels as YouTube videos or Shorts with adapted captions and thumbnails.
Setup at a glance
Your automated workflow in three steps
- 1Connect Facebook
- 2Connect YouTube
- 3Create the workflow
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Before you connect
The short answer
Yes, PostOnce can automatically post eligible Facebook Reels to YouTube Shorts as native video uploads.
What manual work does this replace?+
- No native Facebook-to-YouTube integration or crosspost button exists
- Facebook videos must be downloaded as MP4 before uploading to YouTube
- Facebook Live recordings are available for download from your page's video library
- Facebook Reels cannot be directly pushed to YouTube — manual download required
- YouTube requires title, description, tags, and a thumbnail — Facebook posts don't have these
How to get Facebook videos onto YouTube+
For a regular Facebook video or Reel: go to the video on your page, click the three-dot menu, and select Download.
This gives you the MP4.
For Facebook Live: in your page's Publishing Tools, go to Video Library, find the Live recording, and download it.
Once you have the file: upload it to YouTube Studio.
Write a proper YouTube title with keywords (not your Facebook post caption), write a description with chapters if it's long, add tags, and upload a custom thumbnail.
YouTube's algorithm needs all of this metadata to distribute the video.
Without it, the upload sits invisible.
Adapting Facebook content for YouTube's format+
Facebook videos are often horizontal (16:9 or 1:1) which translates fine to YouTube.
The bigger adjustment is pacing and style: YouTube audiences expect slightly longer intros and clearer content structure than Facebook's quick-scroll format.
If your Facebook video has a call-to-action telling viewers to 'like this page,' swap it for 'subscribe.' Add YouTube end screens and cards after upload — Facebook has none of these.
If the original video is short-form (under 60 seconds), upload it as a YouTube Short instead of a regular video for better reach.
PostOnce automates Facebook-to-YouTube uploads+
PostOnce monitors your Facebook page and uploads new videos to YouTube automatically — with a properly formatted title, description, and tags generated from your Facebook post content.
Facebook Reels get uploaded as YouTube Shorts.
You post on Facebook once, and YouTube gets a complete, properly structured upload without any manual work.
What You Need to Know
How to get Facebook videos onto YouTube
For a regular Facebook video or Reel: go to the video on your page, click the three-dot menu, and select Download.
This gives you the MP4.
For Facebook Live: in your page's Publishing Tools, go to Video Library, find the Live recording, and download it.
Once you have the file: upload it to YouTube Studio.
Write a proper YouTube title with keywords (not your Facebook post caption), write a description with chapters if it's long, add tags, and upload a custom thumbnail.
YouTube's algorithm needs all of this metadata to distribute the video.
Without it, the upload sits invisible.
Adapting Facebook content for YouTube's format
Facebook videos are often horizontal (16:9 or 1:1) which translates fine to YouTube.
The bigger adjustment is pacing and style: YouTube audiences expect slightly longer intros and clearer content structure than Facebook's quick-scroll format.
If your Facebook video has a call-to-action telling viewers to 'like this page,' swap it for 'subscribe.' Add YouTube end screens and cards after upload — Facebook has none of these.
If the original video is short-form (under 60 seconds), upload it as a YouTube Short instead of a regular video for better reach.
PostOnce automates Facebook-to-YouTube uploads
PostOnce monitors your Facebook page and uploads new videos to YouTube automatically — with a properly formatted title, description, and tags generated from your Facebook post content.
Facebook Reels get uploaded as YouTube Shorts.
You post on Facebook once, and YouTube gets a complete, properly structured upload without any manual work.
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Direct answer
Can PostOnce automatically post from Facebook to YouTube?
Yes, PostOnce can automatically post eligible Facebook Reels to YouTube Shorts as native video uploads. This is crossposting automation: you publish on Facebook, PostOnce watches for eligible Facebook Reels, and YouTube receives its own native post instead of a copied link preview.
Content types
Primary wording plus related formats
Facebook source formats
This workflow leads with Facebook Reels, and also covers related Facebook formats:
YouTube destination formats
The destination focus is YouTube Shorts, while also covering related YouTube surfaces:
Manual sharing
The manual route usually means sharing a link, sending to a Story, making a Feed post, or downloading the media and uploading it again.
- Link previews send traffic back to Facebook.
- Watermarks or source branding can hurt trust.
- Repeated downloads make daily posting hard to scale.
- Formats and captions often need cleanup.
Automatic workflow
PostOnce turns the same workflow into a repeatable rule: source account, destination account, filters, and automatic publishing.
- Connect Facebook as the source.
- Connect YouTube as the destination.
- Choose which posts should crosspost.
- Let PostOnce publish future matches automatically.
Alternatives and limits
IFTTT-style automations and native share buttons can be useful, but they often create status updates, links, or previews instead of native destination posts.
- Manual sharing is fine for one-off posts.
- Generic repurposing tools may require export first.
- Platform API limits still control what can publish.
- Music rights do not automatically transfer.
What gets adapted from Facebook to YouTube
Captions
Long captions may need shortening for YouTube.
Hashtags
YouTube: Up to 60 hashtags allowed; 3-5 relevant hashtags recommended in description.
Aspect ratio
Both prefer 16:9 video.
Destination format
Eligible media publishes as a native YouTube upload.
Watermark and metadata
PostOnce prepares media for the destination instead of reposting a link card.
Music and audio rights
Only reuse audio you have rights to publish on both platforms.
New posts and existing content
For new posts, PostOnce can watch your Facebook source and publish eligible Facebook Reels to YouTube Shorts after the workflow is created.
For existing or backlog content, use PostOnce to refill a workflow deliberately instead of dumping months of posts at once. Scheduled batches keep the destination account active without overwhelming followers.
If a video is longer than YouTube's destination limit, it needs trimming or review before publishing. YouTube supports videos up to 12 hours.
Proof before you turn it on
Confirm the connected source account
Select the destination account or Page
Review filters and caption rules
Check the queue and destination post after publish
Facebook vs YouTube at a Glance
| Spec | YouTube | |
|---|---|---|
| Caption Limit | 63,206 chars | 5,000 chars |
| Max Video Length | 4h | 12h |
| Preferred Aspect Ratio | 16:9 | 16:9 |
| Max Video File Size | 10GB | 256GB |
| Carousel Support | Up to 10 items | No |
| Hashtag Strategy | Unlimited | Up to 60 |
| Link Support | Yes | Yes |
| Primary Audience | 25-54 | 18-49 |
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Yes. With PostOnce, you can connect Facebook as the source, choose YouTube as the destination, and create a workflow so new matching Facebook posts are crossposted to YouTube automatically.
Connect both accounts in PostOnce, create a Facebook to YouTube crossposting workflow, and choose your content filters. After setup, PostOnce can detect new eligible Facebook posts and publish them to YouTube without manual downloading or re-uploading.
Yes. PostOnce lets one eligible Facebook post trigger a matching YouTube post, so you can keep both platforms active without rebuilding the same content twice.
PostOnce preserves your media quality and adapts captions from Facebook's 63,206 character limit toward YouTube's 5,000 character limit. Media format, hashtags, and destination rules still depend on each platform's requirements.
Yes. Use hashtag filters to control which posts crosspost. For example, add #crosspost to Facebook captions and only those posts will go to YouTube. Or exclude specific hashtags to skip certain content.
Related Crossposting Workflows
How to automatically post Facebook Reels to TikTok
Auto post Facebook Reels to TikTok as native video uploads when the source Reel is eligible.
How to automatically post your Facebook Reels to Instagram Reels
Set up automatic crossposting from Facebook Reels to Instagram Reels.
How to automatically post your Facebook Reels to LinkedIn
Set up automatic crossposting from Facebook Reels to LinkedIn.
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Features
How PostOnce Handles It
Set up Facebook to YouTube crossposting once. PostOnce automates the rest, so one native Facebook post can trigger a matching YouTube upload automatically.
Easy Facebook Crossposting Setup
Connect your Facebook and YouTube accounts, choose your crosspost rules, and you're done.
Setup takes under 60 seconds. After that, everything runs automatically in the background.
Set Up Facebook to YouTubeNative Video Upload to YouTube
When you crosspost Facebook to YouTube, PostOnce uploads the actual video file — not a link, not a preview.
Your Facebook content appears as a native YouTube post, indistinguishable from content uploaded directly.
Publish Natively to YouTubeCustom Crosspost Rules
Not every Facebook post belongs on YouTube. Set hashtag filters, content type rules, or account-level controls to choose what gets crossposted.
Only the content you want on YouTube ends up there.
Choose What Reaches YouTube
Automatically Post Your Content to Multiple Platforms
Don't stop at Facebook to YouTube crossposting. Send eligible Facebook Reels to several connected destinations, including another account on the same platform where supported.
One post, everywhere. Each platform gets a native upload with adapted formatting.
Add More Destinations
Real-Time Automation
PostOnce monitors your Facebook account and automatically crossposts new content to YouTube.
No manual reposting. Publish on Facebook and new posts typically appear on YouTube within about half an hour. Older posts can be sent in scheduled batches when you choose.
Automate YouTube Publishing
Start Crossposting Facebook to YouTube
Connect your Facebook and YouTube accounts and start crossposting in minutes. No technical setup required.
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