UserScript - Disable YouTube Video Ads and anti-adblocker popup dialog
greasyfork.org
greasyfork.org
The script itself lists the source code before installing. It's readable enough, since it's just a script.
There does seem to be some instances where the blocker notice still comes up, but a refresh seems to fix it. I didn't bother looking into it.
Or you could just pay for the service you so clearly utilize?
Edit: Seems to have been patched. No longer working at a given timestamp (eg a 40s into the video bookmark), except in rare cases and it seems to work in incognito.
The payout of Premium does go to creators but I understand the hesitancy toward giving Alphabet even more money.