[Ruby Gold] “am I correct in my assumption that stuff shot in public domain space can be used legally any way you want–correct?”
Alas, the answer is “almost certainly not.” Just a handful of examples:
–Many buildings are trademarked: Empire State Building in NY, the Trimerica building in San Francisco among many others. I’m aware of many dozens of them, and I’m sure there are many, many more than that. You’re not allowed to use images of them in any commercial work — no ads, no stock photo/video collections, etc.
–Many of the pictures you might think are in the public domain (say, a photo of Michaelangelo’s David that you saw in a junior high textbook in 1968) are simply not (dimes to donuts it’s one of the ones that Getty owns).
–The public domain also shifts. “It’s a Wonderful Life” is one of the best examples of a film that fell into the public domain….very, very briefly. Somebody owns it again. “The public domain” isn’t a safe or sound principle.
There are differences between stepping on a copyright (oops, I tripped) and stepping on a trademark (oops, I’ve fallen into the bowels of hell and there’s a demon drinking blood from my skull)…but the short version is that there’s really not much at all that you’re free to use any way you want.
That’s why it’s always best to buy images with very, very clear licenses. This isn’t to annoy you, but to protect you.
As others have pointed out, doing the right thing — the safe thing — doesn’t have to be expensive.