My favorite game to watch speed runs of is still Getting Over It. The game is notoriously frustrating, with many players spending multiple painstaking hours climbing up small sections of the level, only to make a critical mistake, fall back down, and have to start all over again.
Then you have people like this, who've gotten so good at the game that they're able to beat the entire thing in 1 minute 17 seconds: https://www.youtube.com/watch?v=wnzTObVRwF0
My current favorite (to watch) is Celeste. The humans are amazing, but the TAS is just out of this world. It just looks so damned cool as it blows through the levels.
So true. And for people to understand just how hard it is, on the flip side, I LOVE Dunkey's reaction video playing it: https://www.youtube.com/watch?v=8qGCleYV4cw hahah It's absolutely hilarious to watch.
Then you have people like this, who've gotten so good at the game that they're able to beat the entire thing in 1 minute 17 seconds: https://www.youtube.com/watch?v=wnzTObVRwF0