I was testing with startup movies and they were working at first. However I noticed that even after deleting previous version files from Game/Content/Movies and removing their reference in the Startup Movies array, they were still being copied into my build files. I rebuild and touched here and there, trying unsuccessfully to pack them like they suggest here…
Finally I decided to try and go back to the beggining with a simple .mp4 inside /Movies and reference it in the project settings Startup Movies array, but now any movie is being copied to the build and obviously any movie is being played at startup. Any suggestion? The same file was working before, so I’m sure the problem is not related with the file itself (at least it should work in the same PC it was working before)