There was a really good lore/history video done on Eris and the Moon a while back. I can't for the life of me find it, and all my google-fu keywords aren't helping me. Part of the reason is that I'm not looking for this 8:35 video:
https://www.youtube.com/watch?v=xO0eBDgnAVc

There is a different one, about 10 minutes long IIRC, that I'm looking for. Does anyone know the video I'm talking about and have a link?