And clearly will be used for CP.

“but at least we’re not as bad as the US” is Canada’s unofficial motto.

Yeah, VLC played it, but Plex didn’t recognize it. Just saying, could be something as simple as that since OP isn’t using VLC.

I was recently ripping some DVDs and a few in the process were being recognized as such. Turns out, they were simply missing “.MP4” for the file name.

To test it, you could try rubbing the pad with a graphite pencil. Won’t be as good or a permanent fix, but if it works then you will know what the problem is.