I would like to watch my newly purchased Qigong video in Amazon Prime Videos on my Samsung 5200 TV. Do I have to buy a Fire TV stick to do this? Please advise, in detail...
If your TV is a 'smart' TV, and it has the Amazon video app installed, and it's connected to a network, then you don't need anything else.
Otherwise, yes, you'll need a Fire TV or Roku or other supported streaming device.