>if you're trying to imagine that you're running or biking through an area
I mean videos in the general sense. I watch 2d videos (while using fitness equipment) on a VR headset and find it enjoyable. The best part is blocking out all of the visual distraction from my environment. I look forward to getting a higher resolution headset.
That is, it's nauseating if you're trying to imagine that you're running or biking through an area, because the movement doesn't match your movements. There are a few exceptions.
Our content was live action video, but massively stabilized (it almost looked like CG; many partners assumed it was). So I'm not optimistic that standard video would work for this, at all. Just my two cents, though it's a pretty well-informed couple of pennies.
[1] http://www.vafitness.com/