nginx WEBP from JPG

Hello.
In one of the videos on youtube I heard that there is such an opportunity in nginx:
send the jpg image format to the user in the browser but the contents of the webp file using nginx
those. file, for example, named https://site.org/images/image.jpg
posted on the server in jpeg format. When a browser that supports WEBP accesses it, nginx gives this image:
https://site.org/images/image.jpg
but in WEBP format. With a corresponding decrease in its size.
How is this implemented?
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video [RU]
https://www.youtube.com/watch?v=-D6LHUQQBRI