One thing I really like about this is the link to GoogleDrive. Anything you create saves in your Drive to be used later for more reference. If you are in a class that has a comprehensive exam, you can refer to these flipped videos as a study tool.
It could be used by numerous grade levels, even staff could use it for professional development notes.
When we did our training for TLC, we used this site to take notes and it was very helpful and useful. I can see a teacher who is trying to flip a class use this to be very successful. Kids can benefit a lot, and if you are in a GAFE school, it's even easier. I suggest you look into it.