Yes, I've had older videos fail on me recently (last few days). They were free ones, so no big problem about getting refunds.
If I understood these things, which I don't even in the slightest, I would say something to do with a video codec getting removed during a recent system or software patch or upgrade. Some codecs get used without the proper licences being put in place, so have to be removed again. Hence not being able to decode the video and/or audio stream(s) in the file.......err, at least one of those clever computer expert type chaps at Currys told me when I went in to ask why my vintage grumble flicks wouldn't work anymore.....
