In case you can't make it through the obnoxious guy's explanation above, they talked about the phenomenon (ambiguity illusion) on PBS last night (May 16th). Judy Woodruff is so much more palatable.
https://www.pbs.org/newshour/show/yanny-vs-laurel-spotlights-our-brains-desire-for-filling-in-the-gaps
Fortunately or unfortunately I am on the Yanni/gold dress team.