so when scrolling through speedruns, on some levels like 0-1 and 2-4 the best runs are these crazy glitch skips that send them across the whole level, how did they learn them, or how can I learn them. Any help would be appreciated, thanks!

so while browsing through runs I see that some people have a sort of mod, basically at the end of the run, where it shows you're time and score.etc, there's another screen that shows other speed running times, does anyone know what that mod is called and how do I get it/install it.

Thanks for the help!