Hi, I am new to speed running this game and I had a question about a specific trick. I watched some runs of the game and the runners seem to do a large jump with lumos selected, then change to Wingardium Leviosa and jump and they then get a large jump. How is this trick done?

Hey! That trick is called Lumos Jumping. There is a tutorial that covers some of the tech in the game, you can check it out here (5:35 is the part that discusses this trick):

Thank you, that’s very helpful!