No different then this guy.. Learn the system, there are plenty of those guys here. I am sure you get a lot of advice about "DCMA and all that shit" from them.
From my standpoint I would ask these guys, I am sure they can help you...
....and BTW the content you are looking for is by definition licensed by act of creating it, the only non licensed content is offered by webmasters to promote their site ( in your case quite oxymoronic since you have low traffic) or content over 70 years old.
Seriously My suggestion is to contact suitable webmasters and sell them your story. Disclose what are you doing ( i would for exaple not give clips to something not compliant with 2257, DMCA or some scat tube ....
If you are "up and up" then you have a shot.