Korean Jongwon Chon middway through the double clutch dyno crux on problem 2 in the final of the Rab CWIF 2017. Chon was the only climber to stick this move, which he did twice after falling off above the first time. This was one of only two tops in the whole men's final. Alex Megos topped out on the slab problem 3.

What's the black stuff which looks like PVC tape?

I think it's kinesiology tape supposed to support injured muscles and joints.

Thanks stp.