> Normal people often struggle with converting video. ... the format will be weird. (Weird, broadly defined, is anything that won’t play in QuickTime or upload to Facebook.)"
Except normal people don't use MacOS and don't even know what QuickTime is. Including the US, the MacOS user share is apparently ~11%. Take the US out, and that drops to something like... 6%, I guess? And Macs are expensive - prohibitively expensive for people in most countries. So, normal people use Windows I'm afraid.
https://gs.statcounter.com/os-market-share/desktop/worldwide
In fact, if you disregard the US, Linux user share seems to be around half of the Mac share, making the perspective of "normal people use Macs not FOSS" even sillier.
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PS - Yes, I know the quality of such statistics is low, if you can find better-quality user share analysis please post the link.