1) Because you don't have to like something to learn from it.
2) Because after watching the video, I have to grudgingly admit that Michael Bay does a few things very, very well (even if he does it so much that the overall movie implodes under the weight of his excess).
3) Because seeing something taken apart, then being taken step-by-step through its inner workings, is educational.
4) Because in understanding how these particular shots work, you'll be able to spot Bay's influence in other directors' work. For example, the vid showed a superficially similar shot from (the downright awful) 'Battleship,' and explained why it fell flat in a way that the Bay shot didn't.
5) It's not only possible to learn from art you dislike, the ability to do so is useful.