Most PUA pickup videos are fake. Numerous PUAs have been exposed for using amateur actors in their videos or having the same woman in multiple videos pretending to be approached for the first time.
But even the ones that aren't fake are misleading. Approaching a girl and getting a number from her doesn't really mean shit. While some girls will just ignore you or outright tell you to fuck off...a lot of women will smile, be polite and give you a number. But theres a good chance that number will be fake and even if it it's real, she just won't text you back and will block your number right away if she's not attracted to you (speaking from personal experience here). A lot of women do this because it's the path of least resistance. They want to avoid any potential confrontation so they just give you a fake number (or their real one and simply block you when you text her) rather than say "no" "I don't want to talk to you" "go away" etc.
PUAs target the more sheltered and naive of incels who are ignorant of these facts.