I think you're being unreasonably harsh. I just watched the trailer again, specifically to evaluate your concerns, and: 1) It did not feel like it was too long at 3 minutes. The time just flew by., 2) The 'epic' music did not in any way feel overdone. It was not even the same soundtrack throughout the trailer, but rather it changed once or twice and felt appropriate. It did not feel gimmicky at any point. I mean, the topic is "end of money" and "will bitcoin eventually change the nature of money" or "cause macroeconomic shocks" that the "federal reserve and other agencies are concerned about"... the subject matter was in tune with the semi-epic music, so it felt harmonious.

On the other hand, I feel like the stock footage was a little overdone in its quantity. It was obviously stock and a little low-quality at times (e.g. footage of knights or middle ages), which was a bit distracting. Overall though, that was luckily only a minor portion, and I'm optimistic that when seen in context of the whole movie, that there will be a good balance of content and footage.