I have a few mp4 videos in my vault that will not play. I get the following error: "Couldn't connect to Dropbox. Please check your internet connection and try again." However, if I copy one of the same videos to a folder outside of the vault, it plays just fine. This is on the latest Android mobile app on a Pixel 4 XL. I know this is still in beta, so you can consider this feedback. Is anyone else having this issue? Hope it gets fixed soon!