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 …
Yes, the most recent update is it will be 48-72 hours before ALL impacted videos are fixed (yours may be sooner, that's just how long it will take before every single one is fixed). You could consider reuploading now if that's an option for you, hope this helps!