It only takes about an hour to get the gist of all the moves, but most dancers attend multiple classes to get confident with the choreography. It’s difficult to learn from just watching a video, so it is very encouraged that you attend the classes, but videos definitely help when reviewing. Check the SCHEDULE for class availability.
The main thing to remember is that you are supposed to be a zombie, so you don’t need magical dance skills to look awesome! The more awkward, the better!
MJ’s official full video:
Here are some ADDITIONAL VIDEOS that break down the choreography even more.