Already said 100x.. do stupid stuff in the mountains whatever you want, but don't post them so some clown finds it and copies you.
If you're belaying, do it properly, with anchors and belay devices. If you're practicing short-roping, don't film and post it, read above why. Short-roping is basically reserved for experienced teams, the video shows this team isn't. Besides ignoring that the rope must be slightly taut all the time in this style (second doesn't advance if leader stands still) and at least one piece clipped between climbers, there's total idiocy and the leader running away above the second. Not to mention pushing into the team ahead and -best of all- "tying" to the fixed rope (10:11)

and dodging the other team's rope

. If someone (not tied to my rope) touches my rope without permission, I'll break his arms.
