I use other means when I must have access to content that is only on youtube. I'm not paying money into a company so happy to allow as much scammy crap as the adverts on there are full off.
The Internet is unusable these days without ublock origin or a pihole.
You can change it manually, but it's a defeat of the entire purpose..they intentionally removed the setting to apply the max. quality available to all videos you watch, while already charging you a monthly subscription for the goddamn premium. What a bunch of goo(gl)ns