This page collates, with permission (!), content from the Public Domain guide created by Jenny Strickland, Fine Arts Librarian. Some of the sheet music was from Kris Shanton, Music Librarian.
A couple of articles sent by Prof. Crane brought new sites to my attention; I incorporated them, below.
If you need to license news footage, here are a few sources:
Suggestions for additional sources are appreciated. Email me: Cathy Michael