A mate of mine said about changing his DNS settings to use the yankee version, supposedly a lot more on it. I have that Sky Anytime in my house and I think I've used it twice.
In answer to OP, yes, it's streaming so it counts. Browsing and emails doesn't count if you're with T Mobile. Even if you've gone over your allowance, you're still allowed to do that. I upgraded to unlimited internet with my contract and it was only a quid extra per month. As soon as I'm able to rep you, you'll be well in the red.