I don't really have anything bad to say about their training methods. They work hard...they might condition too much. They use their conditioning as a way to impress potential clients. They became your role models through clever marketing. A lot of people are way better at parkour than them, train smarter than them, and help more people than them....but why don't you look up to those people?? Because those people don't have a marketing department.
Wow, that first video is BEAST. I would LOVE to go there.
I never said that the Russian army had no idea what it was doing; that was probably Patrick; I have the utmost respect for any soldier, whether it be an Iraqi insurgent or Israeli special forces (desk jockeys don't count as soldiers ;) ).
I was just joking when I was talking about Krav Maga; every combat style has its strengths and weaknesses, it's up to the person to utilize it effectively. Russian soldiers are among the best in the world, so I wouldn't doubt it's effectiveness.
As for the guy and the punching, the difference is the arm bend. When your arm is bent, you're using more your waist to punch and not quite as much of an extension of the arm, making it stronger. Same concept as a hook. It's not better or worse than any other punch, just different. The comments on the Youtube video explain it pretty well.
Tutorials are good if they focus on basics (running, jumping, climbing, crawling, conditioning). If you make videos on how to do vaults people get the wrong idea...they think that if you learn how to do 5 different vaults then you are a traceur. It creates a trick mentality.