I really like VLC: find it capable of playing more avi files than QuickTime player and it has a better sound output too. When playing video, you can easily go from part to part, which is not possible in QT player with streaming video. Recently, the downloads also offer a plugin. I have installed it on PPC and Intel Macs running 10.5.7 and it caused a weird behavior on downloads. I could no longer open or download pdf files from MS Web Outlook. Instead of opening a pdf when double clicked on the file name, the browser attempts to open a video and states that no video is found. Disabling the plugin reverts the behavior to normal. It seems to be either a bug in the plugin or some incompatibility with QT plugins (they do not hijack pdf files). I would stay out of the plugin.