Comparing APM is pretty useless because SC players spam a lot of keys to keep their fingers warm whereas the AI is only useful APM, so the AI has a major advantage in that regard.
Also they say in the vid that the AI's reaction time is only 350 ms (whereas pro gamers probably average <200) which is an unfair comparison because the AI sees an action, thinks, and reacts to it in 350 ms which I don't believe a human could maintain. When you take a reaction speed test, you are just waiting for one consistent trigger and responding to it. You don't have to think. Just look at the insane stalker micro of the AI, blinking individual stalkers on low hp to the back of the pack immediately. No human could do that.
There's definitely a large mechanical advantage to the AI here, but it's still p cool.