I haven't ever bought "premium"
js like the Escos that Rocket posted above. But I normally buy
js that are rated for a much higher rating than I'll ever put on them (6T, I think). It's been many, many years since I bought any, and I don't currently have any, but I'll need some (and a jack) eventually.
I think one of the last sets that I had looked a lot like the green set in the video, and the other set that I had looked like these but were all steel and cast iron and 6ton.
I figure if I'm going to life a 3000-4000# car, I want something designed to hold something 2-3 times as heavy for the wide safety margin.
I usually put something under the car in addition to
js. I may leave the jack in place, but with the weight resting on the stands. There have been times that I've taken a tire off and put the tire/wheel, under the edge of the car or something.
I don't want to be squished and take measures. Even when I take measures, if I'm working on brakes or something, I don't even put my legs under the rotor just in case.
Like tires being one of the most important parts of your car, jacks and jack stands are also a place to not cheap out if it compromises safety.