I have been banging my head against the wall trying to copy some video files from USB to this unit, and then to DVD or BD. The files on my USB memory stick are MP4 and MTS (I have both versions of the same files). I have tried everything I can think of to copy these to the Panasonic unit's HDD without success. I cannot find anything in the handbook to indicate which file types are acceptable to the Panasonic unit. Alternatively, I can copy the files from my computer to DVD, but I'm not sure whether the Panasonic unit can then play them from DVD, whether they are MP4 or MTS files. Can anyone please advise?