Got your new Arduino and don't know what to do with it, can't program ?, can't read code ? No problem.
The video seems to hang around half way but it hasn't stopped, it's loading the Arduino IDE and it takes a while to start up. The ./ before Arduino is the linux run command.First you'll need to get the Arduino IDE
https://www.arduino.cc/en/Main/Software
You'll also need the Java runtime environment to run Ardublock you can pick the appropriate version - 32 or 64 bit after you follow the link on the page below.
http://java.com/en/download/
The video above is for seting it up under linux, if you're running windows check out this link https://learn.sparkfun.com/tutorials/alternative-arduino-interfaces/ardublock
Or (for Windows)you can just download the Arduino IDE that already has Ardublock built into it.
https://raw.githubusercontent.com/Makeblock-official/ardublock/master/installer/Ardublock-full-installation-package.exe
This vid explains things a bit better.
If you can blink an LED you can switch a relay to operate any 240v device with an add on relay shield.My 6 year old son is coding like a champ after playing around with these tools, anyone can do it these days.