ComputerPhile, the IT channel
Computerphile is a Youtube channel of the English journalist Brady Haran. This channel processes various topics related directly or indirectly to the computer and that, in the form of few minutes video-reportages. We thus find topics about 3D rendering techniques, computer security, computer history, the Raspberry Pi and many others. Each document is based on an interview with one or more experts and professors and is very didactic.
You can find all the videos by clicking on this link. If the concept you like, you can also find numberphile on the universe numbers, periodicvideo for chemistry, sixtysymbols for physics, astronomy DeepSkyVideo and many others.