What is the black powder used in the "fire roll"?
To me, starting with a cotton ball is cheating. Why not a flint and striker, or a match? There's no cotton balls in nature except on a cotton farm. If you're in survival mode on a cotton farm, hmmm, I'm not sure how you got in that mess.
Myself, I've successfully used the bow drill method, although that began with a piece of cord, also not found in nature! I've never made fire with my bare hands and items I found in nature, but that would be a pretty spectacular feat.