I think those are all good points, but I don't think a fair overview of pixel art could be crammed into 10 minutes. Perhaps the video should have been more conscious of its focus on retrogaming or indiegames (which, as I said, is a natural angle to approach it from for a short piece since it seems to be the most prominent form of pixel art today). I would certainly like to see a longer treatment.
To lavalevel: I'm sure Helm is too modest to say so, and I'm sure his post already made it clear, but he knows more than most about pixel art and its history and he would be a good person to talk to for specific areas of interest or directing you to possible interviewees, (or for an interview himself, as for the past several years he's been the most visible moderator of one of the most prominent pixel art forums on the web).