The only way for this to work is for you to edit your view_video.tpl and right.tpl files and change how the related video links are built. The problem that you are going to run into though is that if your redirect does not have the ability to redirect to the related video, changing the link will not work (for example, if http://www.example.com/site1/somevideo does not redirect to http://www.example/site2/video/path-to-video, the process will fail). This is the problem with using an iframe as I have mentioned earlier. The only real way to solve this temporarily would be to use real frames versus iframes in the short run, but if you are going to go through the trouble, you might as well solve the problem by editing your templates, etc.