Flip YouTube videos horizontally. Just replace "youtube.com" with "mirrorthevideo.com" in the URL.

Why? When two people are facing eachother, everything is on the opposite side. This is confusing if you're trying to copy the other person's dance movements.

At the bottom of this file you will find a payload. When it is decoded correctly, it will turn into another text file with another puzzle. There are many puzzles wrapped inside each other. You will need to write code to do the decoding.