The Doom Slayer's ability to double jump makes navigating maps a lot easier. Jumps are shown with keypresses and speed visible, and explained with slow motion and freeze frames. However, involuntarily initiating a double jump, due to surface geometry, can cause problems. Using autohopping maybe the solution. But then again it appears to be a somewhat "unclean" practice. Apart from that there is a bit of gaming history contained in the video. Namely the origin of the double jump.