How to open M4V file with general video players through new Mac OS Sierra? Why does HandBrake save DVD to M4V not MP4 file? Certainly, discussion about Handbrake rip DVD issues never stops. At some point Handbrake DVD decoder users found there were constant DVD video playback issues as Handbrake rips new DVD movies to M4V format, not MP4. While you are complaining about Handbrake cannot read DVD, ...