If you must know...Every top jumper in the world learned on their own from grinding maps and watching other players...some youtube videos are useful, but the best thing to do is get a feel for the jumping mechanics. You can't learn the feel of the game by watching videos. It takes hours on hours to become even decent at jumping. 99% of the top 50 jumpers probably have over 1,000 hours at least of jumping. The tippy top usually have over 2-3 thousand (unless you have the trait of being an insanely fast learner).