I have been using Vudu for years on TiVo and have built up a really nice collection. My kids watch Disney movies A LOT on Vudu - and I have noticed they really fluctuate in quality, and will buffer for a second or two each movie. With non-Disney movies they start playing in HDX and stay there. It is really odd and took me a while to realize it was just Disney movies, also seems to be “Movies Anywhere” movies as well. I am on AT&T Fiber 1000, so speed shouldn’t be an issue.