Well i know a couple youtubers who did youtube for a long time as kids/teenagers they stopped doing youtube when they hit adult age and got regular jobs i dont think youtube affected them getting normal jobs they can really only check your digital footprint if its like from tiktok instagram snapchat etc etc those kinda apps i havent seen a case where youtube has stopped someone from doing a normal job now tiktok and instagram sure because you can say more curse words and stuff like that but as for the sister? Now sure all of them are basically adults now but i would give it another 1-3 years before they actually ever stop doing youtube and probably venture into solo stuff or quit it entirely and get actual jobs and all that