plugging my video where i explain how NTSC and PAL video work (how you fit color into a black and white video signal). I show you on an oscilloscope what's going on and how it compares to a pure black and white video signal. At 16 minutes or so in I figure out what I'm doing with the scope :p
youtube - /watch?v=xD1AJse9OEI (not linking directly)
youtube - /watch?v=xD1AJse9OEI (not linking directly)