Safeshare works on both computer and mobile device platforms, even allowing you to download the video as an MP3 or MP4 file format. All you have to do is paste the Youtube video link, hit the Generate Button, and Safeshare will do the rest.
It's been great when I wanted to do a Flipped Classroom unit, where I could post the video on an LMS (Edmodo, Schoology, etc) and know that it's safe for students to be viewing. I can also download the file and give it to students on a memory drive or mobile device if they don't have internet at home. Let me know if this site helped you and your classroom in the comments!
- Safeshare.tv: http://safeshare.tv/