... pretty one of the most horrible things I've ever seen
I'd rather prefer 3 to 5 max minutes footage, possibly slower frames!!
I do not think that it is a bad idea to show a "fast" overview and do not think that this form of presentation is bad. However, I would suggest to create an introduction giving an overview in the way presented now for something on the order of 5 minutes. Additionally, I would then present several parts with "normal" speed.
However, this is always a matter of taste.