Speedrunning remains as one of the most fun yet niche areas of gaming, with highly skilled enthusiasts achieving amazing things in classic titles, mostly of the retro variety. They can be great to watch, though it's also pleasing to be shown how it works on occasion, too.
The hugely popular A+Start channel has been running a series of speedrun videos; though they're not world record times, they do provide a clear walkthrough on how these runs work, which is hugely helpful when they're reliant upon tricky glitch manipulation.
The latest entry is for The Legend of Zelda: Link's Awakening, with the DX version used in the run. If you only have six minutes to clear the game, this is how you do it.