Cited as a reference
The Surprising Secret of Synchronization
Why people recommend it
General science video on how coupled oscillators such as metronomes fall into step; cited as background when people ask whether crystal oscillators or blinking LEDs synchronise.
Watch for: general science, not electronics specific
In their words
I watched an excellent video about The Surprising Secret of Synchronization
Uwe on electronics.stackexchange.com, Nov 2021. CC BY-SA.
It could also be an Injection Locked Loop which could be an offset biased and forced oscillation with mutual coupling, and is a common phenomena of nature.
Tony Stewart EE since 1975 on electronics.stackexchange.com, Oct 2021. CC BY-SA.
Edit: What a coincidence; Veritasium published a video on the subject an hour ago, about, what, 16 hours after I posted this.
RobIII on electronics.stackexchange.com, Mar 2021. CC BY-SA.
