A:AnswerYoutube app is available but kinda sucks. It won't be logged into your YouTube account. Very hard to watch them on the watch. Don't expect Netflix or Hulu on the watch.
It's used more for notifications and health tracking. Not so much movies, but it can play songs you download or control the songs and YouTube on your phone.
A:AnswerIt came out sometime last summer (2018). I don't know when the new one will be released. Try visiting Samsung page. https://k7wz8.app.goo.gl/VhKviKcp8BeWfS4f9.
A:AnswerMine is not LTE but my friend has one. Did you get separate service for the watch? I think it's a 10 buck adder. You must have it for the watch to be used as a standalone. This applies to all of the cellular watches out there. If it is near your phone, it is using the bluetooth.