So much this, in NYC (less available now since Covid), there are dump sites for all this stuff (Batteries, Paint, Heavy Metals) as long as its personal amounts (ie cant come with a dump truck) it is at no cost. If you are a business and can not handle disposal fees, well you are unsustainable and should not exist.
Most of them do not work, this 8 year old NYT article claims that 120 out of 3250 signals in NY work a decrease from their census in 2004 and mentions how a different agency found 1 working button across various cities. The only ones that kind of work in my experience are in New Jersey, where if you do not press the button, the intersection will never clear you to walk. The signals and everything work the same, just you will never get walk at the intersection (even when you normally would have) without pressing the button.
I think the videomaker may be failing to account for swap space. The latest Fedora releases use zram (swap that lives in memory instead of hard disk) by default, while the rest do not. Windows in particular does not take 72G and tends to be aggressive in swap allocation. The fact that he presents this data as “free space available” adds confusions while seemingly burying the simplest answer.