I sit on the floor when I’m gaming. I use my right hand on the mouse, clicking through and skipping until I get to the scenes I like.
Then it’s left hand on my dick, right hand braced on the floor, adjusting my position until I find the perfect angle between my body and the floor to stroke comfortably.
I'm a mobile guy so, laying down in bed. It also helps that the best display I have is my smartphone (1440p OLED HDR). I even watch all TV shows there. For more complicated games I use a PC obviously, but if it's simple I prefer my phone.
I'm left-handed, so right hand on the mouse left hand doing the business while most importantly one leg up (usually on my desk) for a good amount of freedom