YouTube can be a great classroom resource, but the comments and "related content" are often distracting and can even be inappropriate. There are two great tools available to help you embed a YouTube video in a clean page with a couple of quick clicks:
1) Quietube (quietube.com) is a button you can add to your browser bookmark bar that "masks" a YouTube video with one click. Done.
2) If you plan to post a video for students to watch, copy the YouTube URL and paste it into safeshare.tv. This will generate a new "safe" link that shows the video on a plain page. Share THIS link with your students to help them avoid distractions and just see what you want them to see.