[jimbosis]

There's another Veritasium video that has a neat experiment ostensibly showing light (both lamp and laser sources) "taking all paths" (or words to that effect--I don't really know what I'm seeing or what I'm talking about!) It starts around 25 minutes in.

https://www.youtube.com/watch?v=qJZ1Ez28C-A

EDIT: Whoops. The YouTube video linked by naasking in this comment: https://news.ycombinator.com/item?id=44771713 touches on the Veritasum video I linked to and goes to some length to explain that it is NOT proving the light is taking "all possible paths." He also brings up and links to a video on the "Looking Glass Universe" channel in which the hostess recreates the Vertiasium experiment and gives a differing interpretation. (Some commenters there have objections to the experimental setup. Oh boy, I may be down a rabbit hole here.)