That’s exactly what I thought. Back in 1990, when I played b-ball for my high school, our warmups were way more grueling than that. We had to start our after school sessions by running 2 miles (our coach ran marathons as a hobby, and he would give us a head start of 1 mile), and if he beat anyone to the finish line, everyone had to run an extra mile.
Then we would go indoors, sprint all the way down the hallway from outside our school cafeteria to the library, and run up and down the huge stairs, then again by skipping one step each time, and repeat the whole thing. Then we were made to do a bunch of pushups, including having to hold the position until coach blew his whistle. Then after that, we sprinted back down the hallway all the way to our school gym, and that was just our warmup.
Then we would be put through a bunch of defensive drills, up/downs, a sitting plank against the wall with our arms stretched out in front of us, and finish off with suicides. If anyone loafed and didn’t give full effort, Coach would take us to the outside basketball courts and make us run suicides in the brutal heat.
The routine that this young man is doing has to be a warmup.