HTML5 video “not working” in Firefox?

Lost an hour over Firefox not playing .ogv/.webm file. Again. HTML5 video is actually working in FF. The problem is that web server doesn’t know how to handle video file formats and I’m getting older.

Add this to .htaccess file

AddType video/ogg   .ogv
AddType video/mp4   .mp4
AddType video/webm  .webm

Update

Safari (and possibly any other browser) hangs when trying to download .mp4 file from password protected directory (for instance, on a test web site). Perfect occasion for a CDN management exercise.