Random Arduino programs I have found online and improved
You will need to install the TVout and Controllers libraries:
https://github.com/nootropicdesign/hackvision-controllers/archive/master.zip
Extract the zip files into your libraries folder.
How to set up TVout is shown here: https://playground.arduino.cc/Main/TVout/
Install the Arduino IDE according to the official guide: https://www.arduino.cc/en/Guide/HomePage
Place the folder of the program in your sketch folder, then upload the INO file.