You want to look into genlock[1]. Tldr, everything that needs to be synchronized (at least your video outputs and your camera; possibly lights and audio recording) needs to accept a clock input from a centralized clock to signal the start of vblank. Maybe one device can generate it, and the others follow.
It's conceptually easy, but I'm sure there's lots of technical issues. Some devices might need slightly earlier or later timing of their pulse. Many devices don't accept a genlock input from the factory, and might need to be modified or substitited. In this case, all the video screens were controlled from outside the room, so they would have picked genlockable devices.
There's a lot of details around the time the shutter is open and the time the image takes to draw... You would need to do a lot of test shots to find what works best.
alt Hacker News
You want to look into genlock[1]. Tldr, everything that needs to be synchronized (at least your video outputs and your camera; possibly lights and audio recording) needs to accept a clock input from a centralized clock to signal the start of vblank. Maybe one device can generate it, and the others follow.
It's conceptually easy, but I'm sure there's lots of technical issues. Some devices might need slightly earlier or later timing of their pulse. Many devices don't accept a genlock input from the factory, and might need to be modified or substitited. In this case, all the video screens were controlled from outside the room, so they would have picked genlockable devices.
There's a lot of details around the time the shutter is open and the time the image takes to draw... You would need to do a lot of test shots to find what works best.
[1] https://en.wikipedia.org/wiki/Genlock