Can't watch previously viewed videos


I recently watch an entire tv series on my WD TV. The other day, i went to watch one of those episodes again, and an error came up saying the file format is not supported. I’ve done nothing to the player or the media in the time since. I installed the latest v1.03 firmware update in my WD TV about 9 months ago when I first bought it. Does anybody have any idea wtf is going on?

Welcome to the forums.

Try a reset – either through the menu or with the paperclip in the hole in the side.  Also, unplug from power for at least 10 minutes.  Everything should work fine then.