Would this explain this behaviour then as well in my community perhaps?
Came in to work a little while ago and finding a few complaints from our users, it appears to be affecting all historical videos within the community.
Yep, we are seeing the same. Every historical video embedded from YouTube is currently displayed as;
Just checked all of ours, still seeing [video] as well, just updating my support ticket now.
Support's response overnight to the ticket I logged yesterday:
Good news, looks like Embedly has resolved the issue:
Please let us know if you are still experiencing issues related to this outage or if you have any further questions.