A:AnswerI do not have any experience with Apple car play but I would say No unless you have an HDMI port to plug into on the car play appliance, based on my experience with connecting to car stereos
A:AnswerIf you have downloaded the media to be viewed to your iPhone as you describe then you should be able to play this on a TV just as you would watch on your iPhone. Basically this allows you to use your TV as a monitor rather than watch it on your iPhone. WiFi should not be needed.