discovered it last July, I've been promoting using A Cleaner Internet as a way to remove from YouTube unwanted "related" videos and advertisements. The only problem was that it required users to install the extension on Chrome, Firefox, or Safari. That left out anyone working in a school that doesn't allow them to install extensions and anyone forced to use Internet Explorer. That problem has been resolved.
If you point your browser to http://youtube.clea.nr you can search YouTube and watch YouTube videos without viewing any of the "related" videos or advertisements on YouTube.
Applications for Education
YouTube can be a great source of educational material to share in your classroom. Unfortunately, if you try to search YouTube in front of a class, you're open to the possibility that something inappropriate will pop-up. Use http://youtube.clea.nr or the Cleaner Internet browser extension to avoid that potential problem.