Yes - this is what seems to be the recommended solution. But as you say, it's insanely expensive particularly as my main use-case which was to allow my partner

Yes - this is what seems to be the recommended solution. But as you say, it's insanely expensive particularly as my main use-case which was to allow my partner to listen to youtube videos from her iphone. And as well as the expense - I don't have an AppleTV or Connect:amp sitting around - it feels kludgy to me as it involves a needless round-trip between digital and analog. Also it's not user-friendly - to listen to a youtube video cast from my iphone requires fiddling with 2 apps.