1. Watch the video, he goes inverted numerous times. It looks like the chair just keeps moving as it would if you were upside down. Most decent size arcades have a similar setup you could try if you have any around you. I think even Dave and Busters has them with star wars games to boot.
2. Those items are probably for different games. I would geuss racing sim as that looks like an e brake (or sequential shifter) and a standard shifter.