Hehe, it’s hard to film and game at the same time! Your system looks pretty professional. Great job.
A short Male-Female HDMI cable would be a nice way to add your HDMI port to the outside of the case. Same with USB.
Looking forward to seeing the next round of tweaks!
There’s a project recently funded on Kickstarter which is a similar concept. Theirs has a screen built in but I believe they claim it can attach to a TV for living room gaming. Maybe you can find out how they did it!
This looks similar to what I’ve thinking of doing for a future project (after I finish my cabinet build I’m working on now… wife says only one project at a time). I was thinking of maybe just getting a basic plastic or aluminum project box and cutting the holes for a joystick/button setup and mounting the pi and a rechargeable battery inside. What kind of lifespan are you getting on the pi off of the 3000MaH battery while gaming?