In general, when shooting video you don't really want SS, fstop, and ISO changing. Best if they stay where they're at. The ideal way to control exposure, as others have said, is to work with ND filters.
I absolutely hate the look of fast shutter speed video. In fact, if I'm shooting, say, 30p, I'll even slow the shutter to 30 as well. It's just a look I like. 180 rule? No thanks, not for me.
OTOH, if that high speed shutter judder doesn't bother you, then you can always allow that to be the variable that changes your exposure. It's the default variable for phones shooting vid so it's kind of a 'thing' now anyway.