One of my favorite gaming channels on youtube is splattercatgaming. Each video is about 30 minutes long and shows game play from the start with a new character, it is also pretty much only indie games (there is the occasional corporate game thrown in). I like this because it tends to give you an idea of how the game plays, something all game companies seem to have a lot of trouble conveying these days. I often find myself frustrated because I can watch their announcement videos, game play videos... Hell, I've even tried demos and walked away having no idea if it's a game I would want or not (I'm looking at you Dragon's Dogma). A nice 30 minutes almost always gives me what I need to know though and more and more I want to support indie game makers.

This is his one for Monsters Domain: