This method is an experimental new feature that is supported only by the most modern of browsers. At this time, the only browsers known to Vistua administration to be supported are Firefox 3.5+ and Google Chrome. Microsoft Internet Explorer is emphatically not supported, you shouldn't be using that browser anyway due to its everlasting security problems.
To support video your browser needs to support the <video>ยน tag. Let's try a test video to see if your browser is supported.
(:xvideo Main/TestVideo.ogg:)
If you see what looks like a video player, and you can play the video than your browser is supported; if you see a red box angrily declaring that your browser is obsolete then... well, guess what?
Method two is better supported by more browsers. Markup is used which allows embedding video from Youtube, Google Video, and Vimeo. Let's try one.