Old footage copyrighted?

[mitk0o0o0]

Hello.

I am working on a project, something like a film, mixed with a lot of stuff like explosions and stuff like that, most of the clips are captured by me.

At the end it's gonna be released as a DVD which will be completely free to download, no orders, no payments, nothing.

But the explosions and stuff just isn't enough and i was wondering if i use someone else's footage, fights for example i see some on Bumfights vol.1 and vol.3

Those are really old and there is NO way i can contact the people who sent them their fight footage to have the originals, but.. i can just rip them.

I'm wondering if that will somehow get me into law problems since i haven't asked the owner of the video to use it on mine. But i think as long as i don't use it for profit it's ok, right?

Also something that made me think about this:
On bumfights 4 most of their fights are really bad quality, that makes me think they just did what i am thinking of doing. I'm saying that because it's not how the videos' quality actualy is. Some of the footage i've seen there i have also seen it on different fight films with 100% better quality, my guess is they ripped it or downloaded it from websites like YouTube for example at that time. And they never got into legal problems about that.

Sorry for my grammar, english is not my language.