Today someone told me via Google Plus how to install Gear Manager on non-Samsung mobiles. His name is Serge Berig. So 100% Credits go to him. I am just posting here what he posted in Google Plus. His Phone is Moto X and Mine in LG G2. Worked...
I Just made a Quick Watch face Wall paper from my LG G2. You can use it in Watch Styler. Share your Watch Faces/Wallpapers/Themes
Added Rado Watch Wallpapers
Yes, Use Bixby Routines and add below condition:
If > App Opened (Video, Youtube)
Then > Resolution to WQHD+