This is shameless self-promotion of my expensive toys:
Fireworks from Navy Pier in Chicago on July 23rd, 2014
Shot with a Sony F55 and R5 raw recorder at 240fps. Lens was Zeiss CZ.2 70-200.
Most video cameras using CMOS imagers scan from top to bottom, and create "banding" during a flash. flashes come from camera flashes, glints of light bouncing off moving objects, or in this case, fireworks. Thinking back, I should've shot with another camera to show an example of that... darn.
Anyway, this equipment is available for rent. Get in touch and we'll work out some pricing.