Best explanation of JPEG

https://youtu.be/0me3guauqOU?is=K4Bpw4XNWvZMtrfl

Very clear detailed description of how compression happens mathematically. 

Best explanation of MP3 music compression

https://youtu.be/jFjDoELxonU?is=iC_N0zX5G_9o8f38

There are a lot of videos out there, but this poorly-edited one is actually one of the better ones. 

Also, useful to view this description of how human hearing functions, at 1:31 in this video. 

https://youtu.be/jFjDoELxonU?is=iC_N0zX5G_9o8f38

Lidar satellites see more

https://youtu.be/UKLuei1CnZY?is=ZKH-uyd20wjBr7pU

Unimpeded by clouds or smoke, LIDAR satellites pan across Earth's entire surface every 12 days. 2:16 Successive images can be compared to observe sub-mm movement. (That implies the satellite plane above the earth is more stable than a sensor on the ground itself.)

4:09 They mapped the interior of a pyramid by listening to it vibrate [from background seismic vibrations] from space. 

Man who made counterfeit $100 bills describes his journey through crime and punishment

https://youtu.be/FGAVpJfG1yQ?is=NlNNU3ase1EYAOy1

This man started counterfeiting at age 19 and spent months protecting his craft and avoiding "bill checker" methods for years and millions of dollars. He used an eye-shadow product to mimic the shiny ink, a fine-tipped glue nozzle to make raised lines, and sprayed a chemical to make the bill-checker pen show the correct color. Ironically, he has to go to bookstores and steal blank pages from Bibles to get the right paper quality. 

World-record most massive vehicle

https://youtu.be/U8772vEfUu8?is=eaUExVAGMvn7h7r0

It harvests a low-grade coal in Germany that's uneconomical unless mind at a huge scale for nearby use in generating power. 

960 frames per sec on a $700 camera

https://youtu.be/Wpko8vAJcEk?is=2-Ww2b0rKcwFelCz

This guy does a very feel dive on the specs, but the footage he achieved is pretty amazing. 

Drone warfare on Ukraine's front line

intense front-line embedded reporting from Ukraine with access to drones, pilots, and their successes and failures and challenges. 

https://youtu.be/t6mp8NmsCIc?is=fgyCX6vR-ikICJQZ

https://youtu.be/yOF2AFh_sGE?is=j8f27XHee79YaSBu

Surprisingly agile and adaptable home robot

https://youtu.be/QfBw0gMuhaI?is=1-Uf4wlK0htBoBrj

Handling wine glasses is particularly difficult because they're delicate and transparent. 

Folding socks, which are deformable objects, is hard for robots. 

Insect nets - the color matters

https://www.facebook.com/share/1GJpvYBGNN/

Quirky build - a self-balancing pole.

https://youtu.be/bbnOmIp4rAM?is=c39I-OEArSEPlPNj

A lot more ingenuity than utility. 

Buying a Coke every day vs increasing in Coke every day

Dramatic results graph. 

https://www.facebook.com/share/r/1C1escazeE/

Nice educational video on Great Blue Herons

https://youtu.be/G643AE1s4gY?is=qz8MpydE_FRDZ1Wr

Especially the range map by week starting at 2:08. 

Impressive bricklaying

https://youtube.com/shorts/gQUVPtMPQuk?is=NhTKFt-pvRWk_aRx

Did you know that my great-grandfather was a bricklayer? 

How EV predicts and calculates range and battery state of charge (SOC)

https://youtu.be/0Z4s6LYB7ls?is=d-1kjpYLxPPRresl

Range anxiety is countered by knowing exactly how much that you have left. Calculating it is not straightforward! 

Can't use voltage because a large portion of the curve is flat. 

Micro mini drone

https://youtu.be/wZlViCPCWJw?is=cjrgdRuPeiBwYjo-

I'm surprised how well the flight controller adjusts to the new configuration seamlessly and flies with stability.