When you back up many movies using the same media, process, hardware and software - (both before and after this particular one)......and only the OTHERS play fine... (in both my PC/Win Media Player and in my HT Oppo player)...there is no call for obtaining a "better yet" player-program.
The problem occurs only with this one movie.
I appreciate all who are attempting to help but assuming this problem is some novice error is borderline insulting.
So please - If you KNOW for certain, or are familiar with this EXACT problem...THEN please reply. Lay the "might be's" aside.