Cliff: It's a tricky area. You're wise to tread carefully. There's a
concept of "fair use" which says you can use *limited* copyrighted
material, if certain conditions are met, in a new work. Those
conditions include how big a percentage the copyrighted stuff will
be in the new project, how the use will affect the market for the
material you include and whether you're likely to make any money off
of the new work (as a doc maker, the answer to that last question is
probably "no").
It is a grey area. Your best bet is to hire an attorney who's
familiar with the subject. Lawyers for the Creative Arts does pro-
bono work, I believe. Other than that, check the U.S. Copyright
Office's page on fair use (
http://www.copyright.gov/fls/fl102.html),
the Cornell Law School page
(
http://www4.law.cornell.edu/uscode/html/uscode17/usc_sec_17_00000107
----000-.html) or see if entertainment lawyer Mark Litwak has
information on his site (
http://www.marklitwak.com/resources/). As
the Copyright Office says, your safest bet is to get the OK from the
copyright owner, which generally isn't hard if it's a local station.
A John Wayne movie would be tougher.