This is 100% a YouTube issue, not a Discourse issue.
@techAPJ went over and above to solve a similar issue with Instagram oneboxes last year, again when it was an Instagram issue and not a Discourse issue.
@jamie.wilson and anyone else who worked on this YouTube issue over the last week or so, I can’t thank you enough.
The level of support you all provide when it’s not even your problem is simply second to none.
I thank you all for your time and dedication 