Its an online payer for programs on the BBC. Its straight forward and easy to use and can access many many different programs. I saw this being used with a teacher during the registration time in the morning. She was watching a David Attenborough program and thought her students would enjoy (and find educational) a snippet of the program.
Might be something anybody and every subject could find useful
For example, tonight there is a documentary on Africa (amazing!) and can watch the history of David Attenborough (who wouldn't?!?!)