I've only found one TV that does this and it does it very well. Vizio E Series Smartcast TV. If you insert an USB flash drive with an MP4 video on it, it will automatically play the video when the flash drive is inserted. Doesn't even matter what input was active, it will switch to USB input. There is no rewind or fast forward though, just pause and play. (This feature was for the store showroom to quickly play video in the store and was never meant for the end user to take advantage of - No mention in the manual about it)