Eyewitness evidence alone is worthless. Even from experts (whose expertise might not always be as applicable to the phenomenon as you might think). All anyone can really say is they don't know what they saw. And even with the recent videos (many explained immediately as soon as the right kind of professional saw them), it's still the same kind of blurry photo type evidence we've always had. Where's the weird material? The device that does something in some way that nobody can explain? You think something would have turned up by now. Until then, UFOs are just ghost stories for people who quite like technology, IMO.
There's data and video available for the Fravor event. It was leaked and ended up on the front of the New York Times. Other videos and evidence has been leaked and verified by the US Government as legitimate. People have (as you should) tried to debunk some of this evidence but it's not conclusive.
The suggestion is that any "weird materiel" is collected by governments and ends up locked up at Lockheed Martin or similar, where (as you'd expect) they try to understand it in order to weaponize it. If something unknown was found, that's what I'd expect would happen to it. Whoever cracks (for example) anti-gravity flight perhaps becomes unbeatable in any future war.
I have never given any credence to UFO's in the past. It's fun to think about but as you say, other than witnesses, there's no evidence and clearly, the vast majority of it can be explained. But when you have a genuine, high ranking US intelligence officer, standing up in congressional hearings and telling everyone that he's speaking to people with first hand knowledge of black budget programs researching this stuff, that lends more credence to it.
The fact that this stuff is being discussed at the higher levels of the US Government is fascinating. Be interesting to see what happens.