[mamachan]

thanks to your advice I tried these settings, which go very well:

- Nvidia Shield video settings: 2160p 59,940Hz
- SPMC 16.7.4 video/system settings: 1080p 30Hz (i'm not able to get 60Hz)

In this way:
- all android app (Netflix, Prime video, ecc.....) works in 4K-HDR regulary
- 720p/1080p videos are played at 1080p by SPMC (and upscaled to 4K by TV scaler)
- 4K videos are played at 4K by SPMC

only the manual switch of the color space is a bit annoying.

Last question: if i set Shield at 4K and SPMC at 1080p i must delete/modify this part advancedsettings.xml code:?

<advancedsettings>
   <fanartres>2160</fanartres>
   <imageres>2160</imageres>
   <imagescalingalgorithm>lanczos</imagescalingalgorithm>
  <video>
    <enablehighqualityhwscalers>true</enablehighqualityhwscalers>
  </video>
</advancedsettings>