Hello Friends, I thought to share you my successful attempt to run prime video new app on my thomson tv which is not a certified device by Amazon. I have followed below steps and I am using latest version of prime video in my android tv. I am not sure whether all the steps required or not but mentioning here

1. downloaded amazon prime video version apk for shield tv, sideloaded and registered using my Amazon account
2. Downloaded the latest prime video app from this channel
3. installed Apk editor pro
4. select the prime video apk in apk editor pro and changed the package name to Com.amazon.amazonvideo.livingroom1
5. install the modified prime video apk
6. open amd register your device using prime credentials
7. open the app... Hurray.. It works

You can delete the Amazon video ( nvidia shield ) app if you want