YouTube is obviously one of the most popular websites to date, especially with claims of having one hour of video uploaded every second! For a great visual representation to help you wrap your mind around that fact, check out onehourpersecond.com. Of course not all of that video is useful to everyone especially those in the educational world. That is why YouTube created YouTube EDU.
According to the creators, "YouTube EDU brings learners and educators together in a global video classroom. On YouTube EDU, you have access to a broad set of educational videos that range from academic lectures to inspirational speeches and everything in between." Check it out and see how useful it can be to your classroom! Enjoy :)