I thought it was a genuinely old silent movie. It was prepared for the delegates of the international conventions.
A young man in a sound car goes to different homes in the neighborhood, and comes upon a bereaved husband with two young daughters. Joe Witness plays "Millions Now Living Will Never Die" to the grieving widower and father.
There is a "smoking gun" midway through that reveals itself at the film's end.
It made me want to believe again . . .
CC