The best free video converter that I have used is to convert DRM protected M4V video to MP4 format. If you have purchased or rented movies/TV shows from iTunes store, you may know all iTunes videos are DRM protected, it can be played on Apple devices only. Fortunately, now you can use this tool to remove DRM protection and convert videos from M4V to MP4, MPG, MOV, FLV, AVI, MP3, etc at 30x speed without hampering the quality. You can check more info on at: https://www.tuneskit.com.