Evening all, I'm trying to run video files on a second hand USB TV, a Grundig GU19WDVDT. Avi files play but are too big to be feasible, virtually no mp4 files do despite the TV saying both mp4 and avi should play. I figure it's a codec issue, after playing around for hours I've found that changing for codec from .264 (which plays audio but not video) to .xvid shows the video but doesn't play sound. Googling hasn't helped, has anybody solved this before? Thanks