Take a look at YouTube for a start. I believe I have seen some done by Packard but many more a shown for Nash, Chrysler Corporation and Ford. If you're old enough to remember the film strip projectors and record players used in grade schools in the late 1940s thru 1950s, some of the items will bring back memories very quickly. One of my favorites on YouTube is "How Packard Builds a Body", showing the wood craftsmen building a 1928-29 closed body. Another shows how Packard engineered their non-independent front suspensions like no other company.
Going down the YouTube "Rabbit Hole" is a great way to waste valuable time in a fun and educational way.
I have visited that "rabbits hole" a few times. You are right about how the time flies. It is amazing how much can be found, and how it leads to another one, and another one.......
I have posted quite a few on The Packard Club website under the media tab.