Except the well known channels, I would like to present (without even knowing those guys) those two channels as I find 'em a great source of information:

#1 The Lotr SBG Team
They make a rule explanation video series excellent for beginners, with some commentary for experienced players too.
Also, I really love their battle reports because they keep 'em short and "to the point".



#2 King Bonezai
He is doing a variety of videos, but the best videos are those that he interviews top players. Dave Nolan did also some videos about that, but having more is always great.

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Conversation/Ideas over painting etc, can check here:
http://www.one-ring.co.uk/viewtopic.php?f=50&t=29455

cool

checked out King Bonezai and his interview was pretty interesting. Seems as though he has a bit of ways to go in terms of camera work but he's onto a fine start and has some great videos out there for specific armies