yes that's happen when shooting with a high shutter speed in a low light frequency .....
and because when shooting over cranked footage with 60p or 50p , the camera increase the shutter speed about the double the fps , for example , when shooting in 60p , the shutter speed = 1/120 , when shooting in 50p , the shutter speed = 1/100 and this speed is faster than the lights frequency you shoot under .
Unfortunately,,, its not possible shooting with lower shutter speed in 60p or 50p mode .
so you need to add some strong lights , or simply do not use this mode in low frequency light .
and by the way ...... thank you for adding my video to your likes ........

I think you may be able to clear it up (somewhat at least), with Krokodove for Fusion. I have seen the same thing happen on RED stuff.

one question Oliver: did you consider the frequency in India (50 hZ)? used to have this type of problem shooting 29,97 fps old school beta with lights plugged into a 50 hZ power outlet. got it also shooting tv monitors, but more radical.

checked with some friends who have ex1s and they had similar problems.

Just by looking at this footage,I think you had trouble with Fluoros.tonygil is right regarding India's 50hz power outlets
and you shooting at 60 fps,and or 24.(No good)Your equipment is flickering away at 60x a sec.While the lights are at 50.Added to this problem is that your camera is a CMOS type which doe not record the frames in one hit.So if there is any flicker of lights or strobing you may get a brighter image in say the middle 1/3 of the frame.Example someone is taking photos with a Flash.The flash is on for lets say 1/110th of a sec.Your film speed is 60p,so about half the frame
has no flash of light.This is because CMOS's scan line by line.Unlike CCD's which grab the image all at once.
I hope that helps.

I shot a war movie a few months ago.Go to Youtube,
(Niflheim Blood and Bullets Pre Sale)Most of the movie was hand held with lightning quick whip pans (No evidence of Skewing)It was mostly shot at night in a jungle forest the generators they had were cheap and nasties so the lights flickered.The lights were daylight balanced Fluoros.
But I shot at 25p and the lights were at 50hz.There was no visible problem on monitors or in post.But the camera was a CCd type(HVX200).The only headache I had with this camera was that in low light the grain is very bad>But the director liked the gritty look.But thats another issue.I always say to Young crews or people from film backround Any action stuff use CCd cameras.
Also shoot 25 or 50 frames for 50hz countries and 30 or 60 frames for 60 Hz.With Hot lights or flickerless type no problem at any speed 24,25,30,50,60 whatever.