[bhousel]

I'm kind of amazed they were even able to record a video in a 1200 Tesla magnetic field.

[d-sc]

Magnetic fields tend to decay with distance from the source which helps.

[etiam]

And broadly speaking by the cube of the distance from the source apparently. But in this case it decays from a mind-boggling starting level by everyday life standards. If that camera is 5 meters away from the source the field there is still about 10 Tesla. I think that's about an order of magnitude more than most MRI machines for clinical purposes, and those already warrant a good deal of care with effects on metals.