Thanks for all the feedback, and I'm sorry that it took me that long to get back to you – things just tend to move slower in the summer.
@juanlargo: I feel you, I do have some favorite commentators of my own, and if this were somebody else's project, I'd be totally with you pushing those guys to add this stuff. As it is, with just me doing this, and commentator names for each match not being readily available (not to mention me not being an actual UI guy who could just put that stuff in without making things too cramped), I'm sorry to say that this won't happen any time soon.
@johnnyfive: It's the same for me, I keep coming back to the big games. I don't know much about the technicalities involved, but it would be pretty cool if all those cameras would just independently record what's going on, so the stream has total freedom to switch around to the most interesting stuff, while the full games can still be put on youtube. This would be pretty much what @keefer mentioned, and it's probably a lot of work with editing and recording after the fact commentary, so I assume this won't happen.
@jdh: I've been going on the assumption that most of the people interested in this kind of thing would be hanging out on pinside or here anyway, so I didn't really think of adding a submission link. I might be wrong, though, so I'll keep this in mind the next time I get a chance to do some work on the site. In the meantime, please feel free to suggest any videos either here or via the contact information in the footer of the site.