I prefer the streaming video, but only because I'm on broadband, and I have easier access to the videos. Plus, the video worked fine on Firefox.
However, people may enjoy downloading them, and I have no problem either way. Personally, I like that on-ride POV's are offered as streams, but I think downloading them makes it more accessible.
I'm not sure you want more work, or if you have time, but you can offer both!