A:AnswerYou don't need to be a YouTube Premium subscriber to use it. Any media purchased via Google TV is available to stream in the menu. You can download many of the same streaming service apps as your phone. Sling, Plex, and Vudu are a few of those.
A:AnswerThe promotion for the Chromecast with Google TV 4K is not offered on BestBuy's site. You may reach out to BestBuy for any promotional offers they may have for the device. If you have additional questions about Chromecast with Google TV, please don't hesitate to contact us on our Google Help page here: https://support.google.com/chromecast/gethelp
A:AnswerYou may be able download the Xfinity Stream app and run it there natively. At the very least, you can stream the content from your phone to the TV using the casting feature of this device.
A:AnswerThere are more than 6,500 apps that you can use on Google TV. You can visit tv.google to view which apps are available, and learn how to install the apps here: https://support.google.com/googletv/answer/10050570
A:AnswerThis has Google TV OS built in, so in essence it will turn any display with an HDMI port into a Smart TV. Note that this cannot do over-the-air TV (terrestrial TV the kind that you get with an antenna), but if you have a streaming service that can do live TV, this device likely has support/an app for it.
A:AnswerNo. It will not continue streaming unless you're casting content on your Chromecast.
How to cast: A quick start guide: https://support.google.com/chromecast/answer/6006232
A:AnswerYou can not screen mirror your iPhone, but you are able to send certain videos to the chromecast and there are apps that work with the chromecast from your phone to stream.