All I can make out is a number of devices connected to batterys!
the text from youtube video only shows up if opening in web browser, copying in here now:
"From left to right, ESPs 8266-01 and 8266-12, Arduinos Pro Mini (3.3V, 8MHz), Pro Mini(5V, 16MHz), Nano, Micro"
There was a problem with 3.3V Pro Mini running at double frequency, got explanation and solution in this thread:
http://forum.arduino.cc/index.php?topic=327787.0
Hermann.