Here are a few free resources to help you with your research.
- British Council Film Collection (120+ short educational films from Britain)
- Archive of American Television (Television Academy Foundation)
- Margaret Herrick Library (digital collections of the Academy of Motion Pictures Arts & Sciences)
- Media History Digital Library (digitized magazines from 1903-1995)
Remember that Los Angeles is rich with film resources, like UCLA's Film and Television Archive and the AFI's Louis Mayer Library. If you want to use these kinds of collections, be sure to find out what they have and then call for an appointment. You'll need to allow extra time, since you can't just show up at these libraries.