I'm a software dev by trade so I just wrote a script to find out the above combinations lol. I just added in the extra couple options you brought up and voila, thats the number.
Last number is the number of total combos it iterated through. This really isn't as complex as you think it is lol. Multiply it by 3 for the time windows.
Anyways. My point for doing that is to show that no, this isn't "impossible" by any means. Its perfectly reasonable that if you want to learn how to do this, you can use the evidence from the video along with combinations and muscle it. Or you can just sit around and complain how people that do know this aren't sharing.