This is starting to feel like the Vonnegut bit from Slapstick (written in 1976 btw):

Western civilization is nearing collapse as oil runs out, and the Chinese are making vast leaps forward by miniaturizing themselves and training groups of hundreds to think as one. Eventually, the miniaturization proceeds to the point that the Chinese become so small they cause a plague among those who accidentally inhale them, ultimately destroying Western civilization beyond repair.

I watched this and have absolutely no fucking idea what it meant

I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy:

• yewtu.be
• inv.nadeko.net
• yt.artemislena.eu
• piped.video