Connect Threads to YouTube

Before you start

• A Threads account. It does not need to be a professional account.
• 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 Threads 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 Threads 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 Threads row. Sign in on the Threads page that opens and allow access.

   

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 Threads as usual. Post Once checks it about every five minutes and reposts each new post to YouTube.

Already using Post Once?

If Threads 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 Threads 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 Threads post becomes on YouTube

On Threads	On YouTube
A 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 carousel (its video slides are left out)	Skipped, with “YouTube does not accept photos”.
A text post	Skipped. YouTube only takes videos.

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 text post has a link preview, the link’s address is added to the text. Quotes, polls and GIF posts 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 “Threads 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 Threads 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 Threads 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.