Questions about LG 65uh600v

is LG web OS2 or web OS3? Is it also 3D?

What is the refresh rate on this LG?

Is it possible to connect this screen to a PC and play films etc. from there?

if i connect a blueray player via hdmi and then bring the sound via the optical output to a soundbar. the usrsprungsformat of the sound (e.g. dolby digital) is passed on.