thx oyu very much alex! will give it a shoot later ;)
edit: works great :)
YouTube vanced chshes when micro g und installed. No matter if microg installed First or not.
Haha. Really? The thing is that I bought it from a commercial reseller from eBay. I got the 1 year warranty from them and not directly from Samsung. I have some days free now so I might download the device trees and start doing some testing builds...
even with knox 0x1 samsung will repair your device ;)