If streamfab is not able to use Widevine L1 how do you expect them to be able to do PlayReady when that is much more difficult and there is no public info like there is with Widevine.
Bonde
It not that difficult as i already seen a program that uses Widevine and PR together, it's more the time, energy and priority you want to put in to get something working.
You can't get more than 1080p from Amazon via the browser because there isn't more. They don't want that. You would have to fool Amazon into thinking it was a Smart TV...
Sebastian001
There is definitely more it's just the key/DRM that is used that wil release the eccess of that max resolution they have, getting 4K DV+DDPA from AMZN through broswer as the same for DSNP, APTV, etc., is possible.