There are currently multiple trivial ways for a layman to block all YouTube ads.
This has already happened, and a counter measure for this first iteration has already been developed - SponserBlock: https://smarttubenext.com/sponsorblock/
Next up, embedded floating ads over the watchable desired content.
Ingress and egress traffic is allowed, not blocked, but requests for ads, tracking, telemetry, etc., if any, fail
Can’t get more layman.