The USN footage of UAP and testimony from USN fighter pilots is certainly evidence by any legal definition - not sure what the difference is between evidence and 'hard evidence.'
It certainly is evidence, but what many of the people participating in this thread think of as evidence is indisputable physical evidence that can be scientifically analyzed. The issue with most videos, etc. is that they are not clear enough to make definitive conclusions and the equipment is not available for analysis by the scientific community (at least that we know of) to rule out measurment problems and/or problems with the equipment.
Another issue I have seen is misunderstanding of the rules of evidence. I have seen some people call all witness testimony hearsay, including first hand witness testimony (e.g., David Fravor's testimony). But, this thread mostly is entertainment and not a legal proceeding, so it doesn't really matter beyond providing subject matter for debate.
The anecdotal evidence for the existance of UAPs is becoming overwhelming at this point. That, combined with the U.S. government's historical documentation on the issue and the way they respond to certain FOIA document requests pertaining to the subject make a compelling case for the UAP subject. But, as of yet, I have not seen indisputable physical evidence, and it is not out of the realm of possibility that much of the anecdotal information has been influenced by misinformation campaigns put out to coverup sensitive weapons development projects. Also, I beleive that much of the anecdotal information is based in misperceptions, misunderstanding, exaggeration and outright lies.
For those reasons I keep an open mind, but as time goes on without indisputable scientific evidence, I find myself moving further away from the NHI hypothesis. Nonetheless, clearly, there are phenomena that we do not understand that are, in my opinion, worthy of scientific investigation.