Say, jorgem4, these aren't by chance VIDEO_TS folders that have been renamed to, for example, MY_MOVIE_VIDEO_TS, are they?
Earlier versions (not sure if the change was in DVD Player or the OS itself) would play these, but as it stands now, the folder must be named VIDEO_TS and nothing else.
So if this describes your situation, create a new MyMovie folder, put MY_MOVIE_VIDEO_TS in it and rename it back to VIDEO_TS.