The LG RH397D only supports MP3/WMA/JPEG/DivX image and audio files from a USB drive. There is no firmware update that changes the supported file types. You will need to convert the MP4 to a supported format. The manual for the RH397D is available from LG: http://www.lg.com/au/support-product/lg-RH397D# /I wish that I had better news for you. Cindy Wells
I don't have one But from the site I looked at it's only a Standard tuner so no digital channels.. sorry. here's the web link. http://www.cnet.com/products/lg-rh397h-dvd-recorder-hdd-recorder-with-tv-tuner/specs/