If you want to watch amazon prime videos on amazon mytv, then you need to enter 6 digits amazon activation code. You need to open amazon.com/mytv on any web browser and enter activation code. Switch on your Smart TV. Now, on the homepage, go to your Amazon Prime App, or, if you don’t have it then download it from your app store or play store.
https://www.amazncommytv-amazn.com/