hexmode.org

iceflow is a small extension for Opera, Chrome, Safari and Firefox browsers which allows you to play videos from YouTube, Vimeo and other services on web sites without embedding support like forums. iceflow searches all the links in the page, detects supported ones which lead to videos and attaches video player to them. So when you click on such link you are not leaving forum you are reading, video player will be opened on top of the current page instead.

This is fourth beta and it is kinda public and stable now. Download links:

You can share you experience in Google+ and here’s a little screenshot of it getting the job done: