Now lets examine this part:
"In a study done by Karen Delise it was found that pit bull & pit bull mixes accounted for only 21% of all human fatalities."
THEN they say:
"Mixed breeds accounted for 16% nonspecific breeds accounted for 15%."
So they know that pit bulls and their respected mixes are the largest percentage yet they spin it to seem like it's "only 21%."
Kinda strange that this study has no mention of any specific breed other than pit bulls.
Looks to me like somebody set out to prove that pit bulls are not as harmful as many might believe but at the end of the study, pit bulls were still found to have the highest percentage of human fatalities.
From the very source the video mentions:
http://www.la-spca.org/dedication/talk/t_judge.htm