Rob does a traditional coil in that video, it's like the coil you would get on a protank but better cuz it's not a protank. The traditional coil can be finicky, which is why I prefer micro's.
The only diff. between micro and nano is the inner diameter of the coil. Many people use pins or paper clips, I have tried a picture hanging nail. The nano was ok, didn't really notice anything diff. than my micro's.
Size from biggest to smallest: mini-->micro-->nano, super x has a table with the corresponding i.d. terms.
really, micros are super easy, the easiest coil to make imho.