What’s the difference between FTP and No FTP?

FTP is when you use fast teleport, which is what Lemmons does for the majority of the map at this timestamp. Basically binding teleport to a grip button and holding it half pressed spams teleport.
No FTP is well, not using that. Because FTP is very dependent on how well your pc can run the game, its easier to split it so if FTP doesn't work well for you you can still remain competitive.