Picked up the GTA video to watch for a full-on-critique. (I'm sure thour't sick of me by now.) I know I commented on this one already but I'll go more in depth this time.
Maybe I've mentioned this before, but the voice volume is low...actually, I mention that a lot to people, ROFL, so there may be a bit of a sound balance issue to get past. I think that all of the sound is low, so it's more of a volume issue more than a balance issue there.
Video quality is good, and this is a standard Let's Play style of game. I can't say there's anything terribly wrong -- so far so good, talking to the audience is important in games like this, and also narrating internal thoughts. Asking people to comment is a good start to help engage people and get them to become part of the game.
I'd also say pulling it together into a story of thy experience may help collect more people. Harken back to what's happened previously in the story, and why it's interesting.
In fact, IIRC there was a broken disc involved and that might make a good personal story to talk about in one of the episodes.
Anything in particular that people should focus on for a critique or is this sort of general first-blush helpful?