I've been wondering for a long time how to do something like this with the background? PHILOSOPHY - Heidegger - YouTube
It shouldn't be hard, but I can't figure it out.
Stock footage film flashes or film damage using a blend mode over a yellow background.
Fractal noise applied to a yellow background.
(editorial comment) That video is incredibly difficult to watch. There are lots of more artistic ways to do a background that doesn't distract from the message but adds to it.
Thank you for you help, Rick!