Try to watch a playlist on Youtube without a add blocker. Its insane the length and amount of commercials. A add blocker save you much more then 10 secs a day.
I fully expect google to decouple the YT ad free portion (they already decoupled YT Red), but until then it's a reasonable value prop.
https://github.com/omarroth/invidious https://invidio.us/ (one of the hosted instances)