I've seen a lot of threads about this across many sites, but no really direct solution. It's usually just uninstall, clean, and re-install. As I have some UI customizations (to add buttons) I'd prefer not to do that if possible.
When I have a video playing and I right-click on an avi file, I'm offered "add to VLC's playlist" in the right-click menu. When I try the same thing with an MP4, it's not offered. It was offered a few weeks ago, but somehow it disappeared. I don't know which program did it.
Is there a .reg file we can download/edit/run that will restore all the appropriate settings? Or is there a config/resource file that belongs to VLC that I can edit?
Some screenshots: