I agree that it's good to have them downloadable but with this reasoning (for "broadband" users):
I rather use 5 minutes to download 1 minute video with good quality than use 1:1 for quality for low speed connections.
Suppose bandwidth was less expensive for MS, they could create a video subscription that pushed the interviews in the subscribers download queue in an almost original quality. I would have no problem with that, as currently I am not viewing the interview videos
on the second they appear anyway. Using proper QoS the video download would not make applications which require low latency any less responsive.
Even if there is not much "true broadband" at homes, there should be services made for these speeds. Infrastructure is there, we just need something to utilize it in full. Most of the "broadband" I see sold here is something like <2 Mbit.