Most painting tutorials on YouTube are goddamn boring to watch. Some guy, talking out his nose, going on and on and on in and endless jabber of paint names until you stick a fork in your ears and write a post in his/her praise on DakkaDakka.
This one actually made me chuckle and learn a bunch of stuff at the same time. Well worth spending 25 minutes of your precious precious time watching it.
(Click it to go to youtube and watch it in glorious 1080p)