CRT TV's modified for movie use

[lnx64]

I heard a rumor from someone who worked in movie production in the 90's, that they regularly had CRT TV's modified to have a refresh rate that didn't flicker to a film camera shooting at 24 frames per second, and it required a special source to even feed it video.

I have heard this a couple times in my life, but never really any proof that this was "a thing".

Has anyone heard of these CRT's modified for syncing to a 24fps film camera shutter to reduce flicker?

I do have a movie camera that films in 24fps, but I am of course able to film at 24fps, if I use a 1/60th shutter (even or odd only frames), or 1/30th shutter (both frames). But I can't imagine hollywood modifying TV's for this if you can simply adjust the shutter of the camera.