It helps to be familiar with steganography; the post is basically proposing to make a unique watermark in a video by changing the starting times of each scene,

It helps to be familiar with steganography; the post is basically proposing to make a unique watermark in a video by changing the starting times of each scene, and the rest of the post is mostly math to figure out how much you'd need to alter it to let you identify a single leaker from a given number of people.