Connect Facebook to YouTube

Before you start

• A Facebook Page you manage. Facebook only lets apps read posts from Pages, not personal profiles.
• A YouTube channel on the Google account you sign in with.
• A Post Once account. The free plan includes 10 reposts, with no card needed.

How to connect Facebook to YouTube

1. Create a free account at app.postonce.com. After two short intro screens, Post Once asks where you post.

2. Under Where do you post first?, pick Facebook and press Continue.

   

3. Under Where else should it land?, pick YouTube. Add any other apps, or a backup, then press Continue.

4. On Connect your accounts., press Connect on the Facebook row. Sign in with Facebook. In Facebook’s permissions dialog, make sure the Page you post on is selected. Back in Post Once, pick it in the Repost from Page list on the Facebook row. With only one Page, it is picked for you.

   

5. Press Connect on the YouTube row. Sign in with the Google account that owns your channel and allow access.

6. When both rows say Connected, press Go to dashboard.

From then on, keep posting on Facebook as usual. Post Once checks it about every five minutes and reposts each new post to YouTube.

Already using Post Once?

If Facebook is already the source of your bridge, open Bridge and press Connect next to YouTube in the Destinations card, or press Add destination on the dashboard.

If your bridge reads from another account, add a second bridge with Facebook as its source from the bridge switcher. Free and Solo include 1 bridge, Studio 3 and Agency as many as you need. See bridges.

What each Facebook post becomes on YouTube

On Facebook	On YouTube
A Reel or video up to 3 minutes, vertical or square	A Short. YouTube decides this from the video, so vertical or square videos up to 3 minutes show as Shorts.
A video over 3 minutes, or a landscape one	A regular YouTube video, up to 2 hours and 4K.
A photo	Skipped, with “YouTube does not accept photos”.
A photo album	Skipped, with “YouTube does not accept photos”.
A text or link post	Skipped. YouTube only takes videos.
A Page Story	Skipped. YouTube does not take Stories.

A skipped post shows the reason on your dashboard and still goes to your other destinations. See long videos for how Post Once tells short from long.

How your caption carries over

The post text goes with each repost. When a link post leaves the link out of its text, Post Once adds it. Events and check-ins are not reposted.

YouTube fills in each upload like this:

YouTube field	What Post Once puts there
Title	The first line of the caption, up to 100 characters. With no caption it names the source, for example “Facebook video”.
Description	The full caption, up to 5,000 characters.
Tags	Every hashtag in the caption, without the #. Each tag up to 30 characters, 500 characters in all.
Visibility	Public.
Made for kids	No.

Write the first line of your caption like a title and your YouTube uploads read well too.

Choose what goes to YouTube

On the Bridge page, the YouTube row has two settings.

• What to post has one switch here, Videos, since videos are all that go from Facebook to YouTube. Turning it off pauses YouTube.
• Rewrite caption changes the caption for YouTube only: Remove comment, DM and link in bio prompts, Remove hashtags and mentions, Rewrite with AI to suit YouTube, and Add your own text at the start or end. Each one is off until you turn it on.

Check that it works

Post something on Facebook as usual. Within about five minutes it shows up under Your posts on the dashboard (press Check now to look straight away), then goes to YouTube. Each post shows where it went, what was skipped and why.

If a repost fails, Post Once tries again up to 5 times over about half an hour. If it still fails, you get an email, and Retry sends it again to just the accounts it missed. See a post did not repost.

Only posts published after you connect are reposted on their own. Older ones are listed in Your posts, where you can send any of them by hand.