What reaches both
One kind of post reaches both Threads and YouTube:
| You upload | On Threads | On YouTube |
|---|---|---|
| Reel / Short video — one vertical video | Posted as a Threads video. | Uploaded as a YouTube Short. |
What does not carry across
Worth knowing before you plan a batch — these are limits of the networks, not of the tool:
- Social photo post reaches Threads but not YouTube.
Limits worth knowing first
- Threads: Captions are capped at 500 characters, and a Threads post here needs an image or video — text-only posts are not supported.
- YouTube: Video only. A photo post can never target YouTube, whatever else it goes to.
Connecting the two accounts
- Threads connects with one click, through its own login screen.
- YouTube connects with one click, through its own login screen.
Both connect once and stay connected; if a network expires its own token, the account is paused and you are emailed to reconnect it rather than left with posts silently failing.
How it works
- Connect Threads and YouTube in Integrations.
- Upload your vertical video once and pick both as targets.
- Let the AI write a caption per network, or write your own.
- Publish now, or schedule it. Each delivery is tracked separately.
Frequently asked questions
Can I post to Threads and YouTube at the same time?
Yes. reel / short video posts reach both Threads and YouTube from a single upload — you choose both as targets and publish once.
Does the caption have to be identical on Threads and YouTube?
No. SOSPosting writes a separate, native caption for each network — the length, tone and hashtags that suit Threads are not the ones that suit YouTube. You can edit either before publishing, or write both yourself.
What can I not send to both?
A photo post reaches Threads but not YouTube. Those are limits of the networks themselves, not of the tool.
What happens if one of them fails?
Each network is delivered independently, so one failing does not block the other. A delivery that fails for good is refunded automatically — you are not charged tokens for a post that never went out.
See every combination on the cross-posting index, or read the setup guides for Threads and YouTube.