This video says about itself:
What It Takes to Film Hummingbirds in Slow Motion | National Geographic
28 July 2017
Once, high-speed cameras were ungainly contraptions, difficult to operate and lug into the field. Now they can fit in a large pocket and are as essential to hummingbird biologists as binoculars are. The sheer magnitude of information captured by these cameras can be hard to fathom.