Some of what's demonstrated in the third video are more parlour tricks than conditioning exercises. You just need to be able to sift through the relevant stuff away from the 'smoke and mirrors.'

See the previous posts regarding "Penn & Teller's Bullshit!: Martial Arts" in:
Post 106
Post 107
Post 108
Post 111

That's a great episode of Penn & Teller's Bullshit! which goes about debunking a lot of the myths and mysticism surrounding martial arts.