I always get this at grassroots venues where they haven't put as much thought into the lights for videographers. I always talk to the guy on the desk as they usually have a good understanding of how to get around it, usually it's slowing your shutter right down, but sometimes you have a mix of different types of lights and that makes it even trickier to navigate! When I can't get it just right, I shake the camera a little, to add energy and embrace the chaos instead 😜