I'm pretty sure it's a reference to https://www.youtube.com/watch?v=Qc7HmhrgTuQ

My exact thought.

Yep

My answer is zero, but most people's answer is much larger. Having said that, how many Google services and systems are there for us?

None. And I would not trust a service today that depends on any Google service either.

I'll visit YouTube for free entertainment sometimes, but I hardly depend on it for anything, and I really wish more creators posted their content elsewhere, even at a price.

Nothing that they actually made themselves after I (I'm not OP) have stopped using Google search, it's just YouTube now.

What has Google actually created that's successful, in house, other than search & gmail?