Hmmm, it'll be interesting to see just how far you get with this, considering your earlier comments on render time:
15 minutes of video = 15 * 60 (seconds/minute) * 24 (frames per second) =21,600 frames
21,600 frames * 60 (seconds render time per frame) = 360 hours of render time alone!
And you've still got to come up with something that's going to be even interesting enough to warrant 15 minutes of someone's attention. That's quite a tall order, even for relatively low-quality renders!
Don't get me wrong, it's doable, alright, but you may want to scale back to something a bit more conservative, and perhaps opt for higher quality rather than higher quantity. This is also why I'm glad to have more than one computer for rendering, even for the short animations I've done.