I would've loved videos like this when I was studying Biology! This kind of explanation with the video is amazingly clear. It reminds me a lot of how the signal is generated in eyes through the build up of charge after light hits the retina.
Every time I go down this rabbit hole I get re-convinced of panspermia. Maybe when I retire I'll study enough statistics and molecular biology to try to get my head around it. Or by then we'll be talking to aliens and the question will be moot.
you can do a mooc on molecular biology pretty easily if your goal is to get a superficial understanding of it. you don’t need to wait until you retire :)