Youtube videos onebox embedding stopped working

[Canapin (Coin-coin le Canapin)]

@bletch

If there is a rate-limit issue due to some recent change then I think other users will start to experience this during migration, re-baking of posts or perhaps just down to a really busy forum. The fact that onebox seemingly fails silently means that these issues aren’t visible until users start to complain that YouTube oneboxes are missing.

Hi, I started rebaking 1M+ posts 2 days ago, and youtube previews don’t work anymore since today, so I guess my IP was banned.
What is advised in this case? Should I just wait for the rebake to finish and contact youtube to see if I can be unbanned?
Or use "Onebox Assistant", crawl for those previews reliably!?