The stock footage Awards: The Best, Worst, and Weirdest Things We've Seen
http://chancefkwy064.iamarrows.com/high-quality-stock-footage-explained-in-fewer-than-140-characters
Although the above mentioned should help to isolate you matter, its just a start off. Know your issue, specially when shooting wildlife. Dont be fooled into thinking all components of an image must be sharp to