She should have just used an ad blocked
I hear YT is cracking down on giving 'unskippable' ads but she's using mobile, versus PC, i'm sure there are ways to block mobile ads too but depending on how korea is maybe some ppl don't have access to it like how some countries need VPNs to use specific sites , although putting up with ads is like not that hard when you consider the money (i'm surprised she's even getting an 'allowance' at her age versus "get a job and pay rent" or so if her rent's not somehow taken care of)
Although with her coffee addiction, cafes aside , surprised there isn't cheap powder mix she can grab a handful of b/c i know 'mix coffee' is popular in korea, or going to a place like 711, getting a coffee and downing it then and there and just paying for the 2nd refill or so XD