I just got an Sony OLED with Android TV and the button mapper app is so awesome.
I mapped the color buttons to open apps:
Yellow - Plex
Red - YouTube, (double click) YouTube Music
Green - Hulu
Blue - Prime Video
re-mapped the Google Play button to YouTube TV (kept Google Play as the double click)
It's awesome enough for how easy it makes life but it's a total game changer for the wife factor.
I think it was like $5 but money very well spent. Simple function, perfect execution.
https://play.google.com/store/apps/details?id=flar2.homebutton&hl=en_US&gl=US
I just programmed the useless JUMP button to this URL: https://youtu.be/SwYN7mTi6HM
Launches it in the YouTube app.