I had a discussion with Tom Beg a while ago about the old film look he gave his Life Cycle of a Mushroom
we also discussed how to alter the clip to make it less generic as its often used.
Here's the clip
And a link to applying it to our animation thanks to Video CoPilot
I think the footage as it is is far too strong for our animation, perhaps testing a reduction in opacity and flipping the footage to reverse plus expanding it to remove most of the thick black border