If you’re a Prime member in the United States, you can watch Prime Video on your Android device through the Google Play Store. If you’re not a Prime member, or if you have an older device that doesn’t support 4K Ultra HD, then you can still watch Prime Video on your Android device by using a Chromecast. To start watching Prime Video on your Android device, open the Google Play Store and search for “prime video.” Once you find it, click on the “watch” button to start watching. If you’re using an older device that doesn’t support 4K Ultra HD, then some of the videos may not play properly because they are encoded in lower resolution. However, overall,Prime Video is a great option for watching TV shows and movies on your Android phone or tablet.