I'm still trying to figure out how ROK Straps are "3-ended," but the video shows at least one application very clearly. The good news is you already got them, so I don't need to try to talk you into trying a pair, but I'll still put in a pitch for anybody else. Bungee straps are undependable and actually dangerous! There are lots of cases where the hook snapped back and nailed somebody very seriously, which I first heard about in horror stories from an eye surgeon I saw way too much of a few years ago. And think how many times you've seen an odd bungee strap laying in the road over the years. I've seen close to a dozen, myself. That's about a dozen lost loads.
I keep a pair of ROK Straps crossed over my back seat all the time, in case I want to bring home something really bulky. One end of each is looped around my "Gerauld" rear rack, the other goes around the short strut between the passenger peg and the fender on the opposite side. When I travel and camp, my large waterproof duffel sits on the back seat, held firmly and very simply by the two crossed ROK Straps. Great product.
(see you beat me to the punch, Roy.)