There is a short video about an owner of one of those small commercial drones who tried to get a look at them with his own, I think I saw it on Townhall.com, sends it up with full charge on the battery, but once it got closer to one of the mystery drones the battery drained in a few minutes and his drone came down.

That might be just a fluke, but it's also possible those mystery drones have some sort of defense.

And that is, BTW, something that has been told for decades about UFO encounters. Batteries for anything that needs them, like cameras, draining near instantly once they are closer to the UFO. Cars stopping too, but at least in most of those stories the car usually starts again after the UFO is gone. But with most small battery operated devices, once we had them, the story of batteries drained is pretty common.

So, anyway, if they are "normal" drones it should be possible to capture one or at least get good video or photos of it, but if they are actually the same thing as what are called UFOs or UAPs, whatever they may be (personally I am inclined to think they are real, way too many eyewitnesses etc, but what they are and have been is a different question, and I rather doubt the "space aliens" explanation) it could be dangerous to get close to one in a helicopter.