Hey im a rookie working editing a music video i shot.
From what I was taught about noise. It comes from high iso and underexposed images.
I shot in bright day light at 100 iso and footage has noise problems.
Heres the link to the vid im editing. Its at 17secs(look at the black jacket) and all the way thru.
http://www.youtube.com/watch?v=DJoRdqyE-70
Canon t4i with kit lens. 24fps, 50 shutter speed, Lightform c picture style