From 1veritasium, 2veritasium, or sciencium.
I find the story of gravitational wave detection fascinating, particularly as it shows the deep skepticism of scientists. First, disbelieve.
The absurd physics of gravitational wave detection: https://youtu.be/iphcyNWFD10
Music from http://www.epidemicsound.com "Trapped in Cello 1"