I agree with you, though it seems like there was some decent money and time put into this (the video production seems professional), I can't figure out what 37sigs motivation for this is though. Eventual DVD sales?
We want to tell stories that we don't feel like are being told. The conflicts of building businesses to last versus sitting with all the risk.
This actually started as an email conversation with the Slicehost guys about some of these dilemmas. About living mojito island and so forth. And I really like the debate and thought that others would too.
37signals chief strength has been in building a following around their dogmas. Remember that their customers are small businesses; they've positioned themselves as an expert among their peers and interviews like this solidify that. That audience is what allows them to sell (generally mediocre) products into very crowded markets with a reasonable premium.
Total coincidence, I'm sure :-P