I have just started converting my DVD's to add to my itunes library. I did it all through a PC. I ripped the DVD using DVD shrink then used the PC version of Handbrake to convert it. I selected the option to convert the file for AppleTV which it did. Everything worked fine and itunes plays the file but it is named an M4V file instead of an MP4. Is this ok? What's the difference? Also as well as setting handbrake for appletv I also ticked the boxes for 2-pass encoding and Turbo 1st pass. Is this all I need to do, is this the best setup? I am doing this all on a pc as my pc is free where my mac needs to be used for other things, I was planning on connecting my appletv through my pc. I take it this should work just the same as a mac?