Venti's voice actor playing Genshin I Read Description for more info. 

Another tweet of Ayumu Murase (Venti Japanese voice actor) screen recording of him playing Genshin Impact.
A rough translation for his tweet " He has to raise Mona and Tar."
Btw If you want to watch him play you can go to his twitter account and click the link on his bio. It will bring you to Mildom. (Japanese game streaming site, also have an app.) He tweets the time when will he stream. You can interact with him by live commenting on Mildom but just be polite. We do not want to have a bad impression.
Also he will then privated his video after streaming so you will not find his past streams and please don't reupload his Mildom stream/broadcast.
Edit: You can also find this video on his twitter @murase_pipipi. He uploaded it. And follow him on Twitter Thank you!!!