(Not a Teacher)
1) Well, the active sentence specifies who's dedicating four and a half minutes to "Fire and Ice". If that's pertinent information to your topic, then I'd definitely include it.
2) The first one is passive and the second is active, as you have already said.
3) I'd say that's up to your professor. Just ask him if he has time. Unless he's already stated that he wants your paper in a particular style, such as MLA.
Interested in Language