The following is from a Youtube documentary titled, History’s Mysteries: Bigfoot and other monsters. It appears within the first minute (and later on again). Link
“If Patterson Film is real, and here this is with a very very big qualified if, it is one of the most important scientific documents of the last one hundred years.”
What does the ‘qualified if’ mean?
PS: I know it is not a strictly grammatical question but one pertaining to usage, yet I need an answer. Kindly consider my request.