Can someone tell me the file what file types are supported, or can be managed in the Media Library? I am struggling with an audio/video sync problem and am trying different things. I used Handbrake to do my latest file, and chose a MP4 container. When the file was complete, the actual extension of the file was .M4V.

When I try to update my media library with the new file in the right directory, it doesn't bring it in.