I have tried sideloading from the normal Play Store and also used the one from ReviewDork ( https://www.youtube.com/watch?v=ZDkA2lw-MhE ). The last one seems perfect until I start a video and then it just pops up a message - This video cannot be played. Does anyone have any ideas where I can get a working APK. I am desperate to have all my TV services on one box and this is the last hurdle to cross. Any help is much appreciated.
Did you tried the Androdi Tv version?
Prime Video_com.amazon.amazonvideo.livingroom_4.10.3-googleplay-armv7a.apk
https://toengel.net/philipsblog/2016/08/09/philips-amazon-video-auf-2016er-tv-modellen-verfuegbar/
Same frigging issue
App works fine but when you try to play a video, it says Sorry, encountered an error
Are you on Nougat or Oreo? I remember when I had a MiBox, Prime would not work on Nougat. I had the same things you described. Then when the Oreo upgrade came I tried again and Prime suddenly worked fine.
Nothing worked for me either until I reset the box. Then it's all worked perfectly.
Honestly Prime TV app is terrible, sluggish, and the content is very poor. Have it both sideloaded on Mi Box and installed on Shield TV and it's very poor. Thinking about cancelling Amazon Prime soon.
Tried this?
https://prime-video-android-tv.en.aptoide.com