I happened to come across this on YouTube tonight. It is very well done and shows numerous Springfield residents who are buried in the cemetery along with some very interesting stories. It's a bit on the long side, but it's worth the time.
One negative, however, is that the filmmaker completely ignores the Lincoln-related burials there, such as Herndon among others. Also, nothing on Oliver Barrett, Benjamin Thomas or Harry Pratt.
Best
Rob
https://www.youtube.com/watch?v=n2ehWdhAi8c