I've seen developers at FAANG companies using the background video trick - because corporate managed devices came with an unmodifiable lock/sleep time.
And if school-issued laptops were even more locked down, with even more boneheaded defaults - that would hardly surprise me.
One of my teammates just put on (IIRC) a 72 hour long black screen video and reset the video back to the beginning when he left in the evenings.
It needed to be 72 hours long because he didn't want to come in on the weekends to reset it.
Anyway, it reminds me of the very popular Caffeine app for MacOS, which prevents the device from going to sleep. Used by a lot of developers (at the time) as well, so it's not just kids.
Not to say that setting a single screen lock time setting is the pinnacle of curiosity, but it’s reflection of the banal utilitarian way they look at devices. “It does what it does”