Did you enter into a contract saying you must watch ads to use the service? Is ad blocking against ToS? I don’t think either are true, and a “click to consent” isn’t legally binding. Either way, I will never not block ads as it is important from a privacy and cyber security perspective.
In that case it is a ToS violation, not piracy. You aren’t paying anything, nor does google lose any money since they have been already paid. We would have to stretch the definition of piracy to include other ToS violations since it is not a financial lose.
Let’s extend the scenario. If YouTube ToS required you to click every ad to use their service, would it be piracy if someone doesnt follow those instructions? I think it would be a ToS violation, but what damages could Google even seek?
I hear people sometimes mention that “Google needs to pay somehow to keep YouTube running.” I have no sympathy for Google since they conspired to intentionally push out other video hosting platforms to create monopoly on the market. It is their own fault that videos aren’t more spread out among providers.
How would you even pirate YouTube anyways?