Here's an example:
Notice how clearing the box is more about him pulling is feet up as opposed to him launching himself off of the ground. Notice that his hips only moved like 2 feet off the ground
Don't get me wrong. I think plyo box jumps are a great exercise. I do them. Just don't get fooled by these tricks. It's like tearing a phone book in half by the spine to demonstrate strength
I used to get caught up in trying to get on top of the next highest jump box (I bought a set). Then I moved and gave them away. I joined a gym that didn't have them and I realized that all I had to do was give it my all on every jump (no matter how low the box was) and try to get as high as I could over it, I was getting the same training
...but without the impressive video