Oner of my recent favourite things has been watching people do these tricks live. Here's another AGDQ video, the guy executes an elaborate buffer overflow in mario 3 by hand to make it skip to the credits. It's called a 'wrong warp' or a 'credits skip' and it's completely ridiculous.
Same, I pretty much leave AGDQ open on a secondary monitor for the whole duration.
I didn't see Mario 3 live but it seems pretty insane. In a similar technique of wrong wraps is the glitch run of Zelda 2 (https://www.youtube.com/watch?v=IXEx9zIEoJw#t=288) - the speedrunning community has an insane level of dedication, there are so many of these frame perfect tricks/exploits and it's just like... how do you even discover it!?
https://youtu.be/c-bkDz0wPsI?t=3774