The YouTube channel [1] where this video comes from is a treasure trove for the intellectually curious, and it's one of my favourite things on the internet. The guy behind it, Ben Krasnow, is an engineer at Google. From explaining and demonstrating (reverse) spherification to encoding information in fucking fire and picking it up with his oscilloscope, this channel will interest and delight most folks who enjoy HN for hours.
[1] https://www.youtube.com/channel/UCivA7_KLKWo43tFcCkFvydw