To be honest, Apple shouldn't be doing this. Its fine if they remove a Google app from their OS, but they should at least replace it with an equivalent application.
If they don't, it benefits no one.
YouTube is not theirs, it's Google. So it's up to Google to provide service and they have. Through their HTML5 mobile site.
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If the license has ended for IOS devices why is it still on the Apple TV ?
That's an IOS device.
We haven't seen a seed for ios for the Apple TV, perhaps it's not.
It's alo possible that it's just a different contract