I pay for Google's streaming music service so I get free Premium YouTube as part of the deal and nothing gets me to sign in faster than three sodding ads in a row. This is gonna backfire on them. Most people can't/won't pay premium and they won't suffer this. An exodus cometh.
Plus, you can share your account with up to five other members (maybe six) of your family (finger quotes). So you could pool your funds together with some friends and cut a bunch of cables. Google has your viewing habits, but then again, so does your cable megacorp.