Miro (was Democracy Player) makes video on the Internet way less frustrating and way more enjoyable. You can subscribe to channels of Internet video, download videos, and watch them fullscreen, one after the other, all in one application. A built-in channel guide brings you new content every day. It's free and open for everyone to watch and to broadcast.
The Mac version of Miro uses Quicktime 7, which is built into the operating system, to play video. In addition, we use plugins for Quicktime that allow us to play even more video types. The Mac version can play MPEG, MP4, MOV, H264, Flash, Xvid, AVI, OGG, and more. Also, there is a free extension for OS X that will play Windows Media files seamlessly.