Aw man I feel really dim… My issue was that I was copying to wrong url (the one from the browser’s url bar instead of the share one) So it was https://www.youtube.com/watch?v=89Jji-dl3Do instead of https://youtu.be/Mc6VabRenn0 So no issue with my website just the person managing it needed to switch on their brains.
I’m having the same issue unfortunately.