When watching a video on Youtube it's often worth to check out the related videos too. Of course, most of them will not be interesting, so it would be nice if one could quickly watch them without clicking them one by one.
It is possible to do this with a bookmarklet which you can easily add to your browser and activate on any Youtube page.
Click this link: youtube hover with the right mouse button and in the appearing menu select Add to Favorites (Bookmarks). When it's done you can watch any video on Youtube as usual and if you want to see the related videos then you click on the bookmarklet, simply hover over the related links with the mouse and the related video appears instantly in a popup window.
Isn't it cool? Write a comment if you find it useful or you have suggestions.