Awesome_Stuff_Is_Awesome

I made it! I have the sensor dangling in a sump pit in my basement, with the ESP8266 sitting on the floor next to the hole. I hope I won't ever need to receive that text message though...

This looks exactly like what Make Something (youtube channel) made a little while ago...

In the most simple terms: No. The composite video uses a different type of signal that is not compatible with data. This instructable is only a way to use the exra wires, not to broadcast or split the input.

No

Reading the title I thought you were going to make the head, implant it into a young tree and then come back 20 years later and carve the handle from the tree! :-)

So cool.... I want one!

I wonder if it could be put into an old Atari game cartridge

The finished ball will weigh the same amount as the foil you started with. It will also have the same density. The volume shrinks because you are taking out all the air bubbles in the foil ball.