Update: we fixed what's causing this, so any new video uploads won't experience the same frozen, out-of-sync audio issue. If you've been waiting to post–go for it! We're now in the process of fixing all impacted videos, which will take a bit more time. Appreciate your patience!https://twitter.com/TeamYouTube/status/969298199658733568 …
We uploaded ours 4 times yesterday and didn’t know what we were doing wrong as it kept freezing
so glad this is fixed now, will try again this morning 