I tried installing Ubuntu Server and later followed Nico D’s video and configured the Ubuntu-Mate desktop. I was able to play Youtube on Firefox. I was able to install Chromium and Vivaldi too. However none of the browsers are capable of running DRM protected content (such as Amazon Video). I even tried extracting " libwidevinecdm.so" and " libwidevinecdmadapter.so" files from ChomeOS and pasting it into chrome browser folder, using User Agent switcher etc. However no signs of luck. Looks like we just do not have capability to watch DRM content on Rock Pi 4. Sad! Any suggestions? Was anyone able to watch DRM protected content on Rock pi4?