my 8year old son knows how to work a laptop and watch what he wants on YouTube I don't like it idk…

my 8year old son knows how to work a laptop and watch what he wants on YouTube I don't like it idk if I don't like it because he's growing up to fast or because the internet YouTube can have and inappropriate things for his age I get nervous he will run into ,he's just watching Britain got talent but one wrong click who knows what will pop up...I guess its both