First off, thereís no need to be rude. Your tone is not appreciated. Iím just trying to explain to you the knowledge that I have based on what others have attempted in the past.
You are correct that both games use the Alchemy engine. However, they use different versions (XML2 uses Alchemy 3.2 and MUA1 uses Alchemy 4.0). In addition, each one has been tailored specifically to that game. They both have different capabilities and different hard-coded aspects. So theyíre not the same. Just because something works in MUA1, that doesnít mean that it will work in XML2.
If youíve been able to get HD movies to work on MUA1, thatís great. I havenít heard of this working before though when others tested it. If you have, please do post it and share it with the community, or at least share your methods with an example. Youíre also more than welcome to attempt the same with XML2, and I would be happy to include it in the X2UP if you can get it to work. But so far, I havenít seen anything like that work before, so I was relaying that information to you. This is what we are currently using for the X2UP:https://marvelmods.com/forum/index.php/topic,11208.msg202538.html#msg202538