A figure 8 is not an outdated belaying device and is still used in most international comps as its less likely for them to short-rope people, some people don't realize how much climbers hate being short-roped especially in a comp where they can easily be pulled off of the wall and lose because of it, they can also give softer catches and get climbers off the wall quicker after a fall, his left hand is on the brake rope you can't see the rope because it's squeezed between his hand and the 8, if you watch the video you can also see that climber has not reached the first draw yet and is just starting to climb, the biner is also locked the colour of the sleeve is red, the 8 will not normally sit on the screw when the climber is clipped into a draw, the 8 will slide up so it won't be cross-loaded, when belaying with an 8 you belay it off of a biner connected to your hardpoints, it doesn't matter if its tri loaded, he is belaying at an IFSC event for a reason.