This is an essay I found recently that uses Latour’s actor-network theory in relation to documentary. I haven’t finished reading it, but the first few pages where they talk specifically about actor-network theory – what it is and how it works – you should all find very helpful. And relevant.

Gershon, Ilana, and Joshua Malitsky. “Actor-Network Theory and Documentary Studies.” Studies in Documentary Film 4.1 (2010): 65–78. (pdf – rmit login required.)