YouTube punishes ad-blocker users with slower videos on all browsers
Jay Bonggolto writing for Android Central
Some people have speculated that this delay might be a clumsy attempt by YouTube to force ads on users who block them. The code in question might be trying to make sure that an ad plays for at least five seconds before the actual video starts.
The fact that Google is attempting to block adblockers on YouTube tells you who Google considers the real customers to be. Users are blocking ads because the experience sucks, but rather than trying to improve the experience for the users, Google chooses to force the enshittification on them.