Vivo V5s comes with latest Android 6.0 Marshmallow OS which has got Vivo's patented FunTouch 3.0 skin layer. Since the device is newly launched, we do not expect that company will release the new software update immediately.
Yes, Vivo V5s does have softlight feature.
No. You cannot record 4k videos.
Vivo V5s has ARM Mali T-860 MP2 graphic processor GPU.
Vivo V5s have 4GB single channel RAM.