A:AnswerYes it can. The Kindle app is still available in the Windows Store. I will warn you that it's aweful. But that's an issue with Amazon and not the tablet.
A:AnswerI've watched Netflix shows and movies on high resolution and have not had an issue. I have done the same with YouTube videos with no problems. I hadn't experienced overheating but it will get warm after a while of usage.
A:AnswerThe Windows 10 version plays Xbox games. I assume that means you can stream them, but you need to check if there are any memory requirements of the game.
A:AnswerBattery life isn't terrific on this tablet. To be fair, though, battery life is usually an issue on all cheap tablets, so I suppose it's a case of you get what you pay for. I estimate the battery can last about four hours of screen on time.