a DIVX player will appear and the video will start playing in it.
note:
you need to have the divx player installed. and also some videos might require you to have the AC3 Sound Filter for the sound to work.
You can also use this to create links by appending the megaupload link after http://megaallday.com/mu?link=
this system can also be used as a bookmark. instead of copying the bookmarklet and pasting it in the address bar of the megaupload page when the download is ready, you can just bookmark the bookmarklet and use it on any megaupload page by hitting it in your bookmarks from the megavideo page to stream a video from megaupload without having to come back to this page to grab the bookmarklet each time. But note that this bookmarket makes the file run in a divx player so it can only play files that would play in a divx player such as avi and divx video formats.