numberphile's Channel - YouTube | Video for Learning |
Coming soon from Brady Haran, who also makes sixtysymbols and periodicvideos...

I suspect that this channel, due to launch this Friday (11th November), will be of great interest to teachers, especially those working in STEM subjects.  There are already over 2000 subscribers, (inluding myself),  even thought there is only the trailer video at the moment.

In fact a trailers might be a good way of raising awareness of educational content. It is also   that YouTube is investing in this channel.