If you’ve ever used Handbrake to rip a video, one of the options in the iTouch/iPhone format is MP4 or M4V. Which should you use?
In my experience, the files are exactly the same except that the iTouch needs the .M4V extension, while my WD Media Player needs the MP4 extension if you want to Fast Forward through a video. To play videos in my iTouch I use Better File Rename to rename all my videos with a M4V extension. If I want to play them on my TV using my WD Media Player, I change the files extensions back to MP4. Weird – but it works.