We perform m worse or worse when we know we are being observed.
Maybe this is a critique towards online tracking, when we are knowing that we are being tracked, or watched, we perform worse.
Plus, if you strive to maximize your performance, don’t record yourself at the gym, and even don’t record your maximum lifts.
You don’t need proof, your word is your proof.
For example, perhaps the skill of the porn star is performing well, even though they are surrounded by 1 billion cameras.
Also, if you wanted to have better sex, do you think you would perform better if you know you’re being watched? I think not.