ViewPure is a service that allows you to watch and project YouTube videos without seeing the related sidebar content typically seen on YouTube.com. ViewPure offers a free browser bookmarklet that you can use to clear the sidebar content while viewing a video on YouTube.
ViewPure has been around for a four or five years. Recently, the site was updated to offer helpful search tools. You can now search for YouTube videos through the ViewPure website. When searching for videos through ViewPure you don't see sidebar content, you only see videos. You can choose to use strict filtering while searching through ViewPure.
Applications for Education
The ViewPure website and ViewPure browser bookmarklet are great tools for teachers who want to show a YouTube video in their classrooms, but don't want to risk displaying "related" sidebar content. To be clear, ViewPure is not a work-around if your school blocks YouTube and it is not a tool for downloading YouTube videos. (Downloading YouTube videos is a violation of the YouTube terms of service).