Hey Snowey:
This game will HOPEFULLY get the Chinese update before the end of this year, and no idea of when the brother appears.
As for NSFW scenes - this is a no.
Finally - yes, you have permission as a series for your Youtube, and you may link the game for people to come and watch + download! Please, enjoy this FVN!
Please also present a link of the Youtube series video on here, as proof, should you wish.