If it's catted you shouldn't get a CEL, as it still cleans up the gasses enough to meet the cars requirements
Not all cats are the same, i've tested it with my dp and the 300 cell cat if I put it on stock or stage 1 it will pop the code, its just not efficient enough.
probably both.Odd, doesn't seem to throw a CEL on the CCZB cars that I know of. It's either the higher quality fuel we have, or possibly cat output tolerances are different over the pond
Video
What do you want for a video, i don't have professional recording equipment beyond a cell phone, but i will record whatever you like.