This video from the USA says about itself:
Broad-tailed Hummingbird Hovers Up Close – June 9, 2017
When hovering over a feeder, Broad-tailed Hummingbirds beat their wings at a rate of 50 times per second! Male broad-tails often hover while foraging because it provides a high “platform” from which they can spot females and intruder males.
The West Texas Hummingbird Feeder Cam is nestled in the mountains outside Fort Davis, Texas, at an elevation of over 6200 feet. This site hosts a total of 24 Perky Pet Grand Master hummingbird feeders, and during peak migration can attract hundreds of hummingbirds from a dozen species that are migrating through the arid mountains.