Ad-Free Internet
PC/Mac
FirefoxMake it your default browser. And stop crying, Chrome is shit and you should feel bad for using it for this long. Go to the following link next ON YOUR NEW FIREFOX BROWSER.
Ublock OriginYou're done and you're welcome. Buy me something nice for my birthday.
Android (y0utube app):
iPhone:
Sorry, no recommendations yet. You should be able to do the Firefox+Ublock combo above via the app. Otherwise... get a pixel so you can do this to it.
DNS-Level:
Pi-Hole will take care of everything on a network level (AKA, while you're at home). Mixed results on video players.