This just came out and it's by far the clearest explanation I've seen. I'm still not putting any money in it but this helped me understand it better.
<iframe width="512" height="332" src="https://player.pbs.org/viralplayer/3073841523/" allowfullscreen allow="encrypted-media" style="border: 0;"></iframe>
<iframe width="512" height="332" src="https://player.pbs.org/viralplayer/3073841523/" allowfullscreen allow="encrypted-media" style="border: 0;"></iframe>
