Cheers for your honesty on this post, Zender.
It often takes bad stuff like depression to get people to jump into religion or spirituality like chi. If life is going well, theres less need to introduce something so different.
Chi as i see it, is focused energy. Like Bruce Lees one inch punch, he focuses on that one hand and primes his arm with energy (bloodflow and focus).
People who are singularly focused on winning, not thinking about what they are having for a celebratory dinner or caring whether they wont look pretty after a fight, these guys are gonna have more focused energy or chi in regards to the fight.
And those boys on the video? Shiii, i can do that stuff with my hypnosis training - usually the 'victim' is submissive to your needs, so you focus on what they do and they pick it up subconsciously.
Anyway, its my opinion, might not be reality.