I haven’t spent much time going through Google’s video search site, but I saw something interesting over there today. They’ve added a bunch of interviews from the Academy of Television Arts & Sciences Foundation that feature television producers. Most relevant to animation are interviews with Joseph Barbera of Hanna Barbera and Phil Roman of Film Roman. I haven’t watched them yet, as the interviews are quite lengthy, but I imagine they’ll provide some great insights.
If you do some more digging, there are brief clips where Sherwood Schwartz talks about the Brady Kids animated show, James Garner mentions his voice work for Atlantis, and Quincy Jones talks about working with Chuck Jones. One more to check out might be Joan Ganz Cooney who helped create Sesame Street, probably everyone’s gateway to animation.