[U2Lynne]

You wouldn't be accidentally saving another video into the same VIDEO_TS folder, would you? Although, if you are only having problems with that one video, then I would guess not. (And, that would be hard to do unless someone forgot to put their VIDEO_TS folder into another main project folder prior to creating the torrent and usually someone catches that.)

But, I would do as Tom suggested and try verifying the md5 checksums and making sure that they pass.