I've seen a lot of film shorts from the 1930's through 60's. Most have not been overtly religious in nature, but this one is. It seems aimed at Christian teenagers and I'm not sure where it was originally shown. I don't think it could be shown in public schools because of the religious tone, and it doesn't seem like the kind of thing to have been shown in general movie theaters before a large release movie either. My guess is parochial schools and/or Christian youth camps.
It involves some Christian high school kids and the dilemma they face in how they act about their faith among their peers at school. It is very well done, compared to some of the other shorts I've seen, like Social Courtesy or What To Do On A Date. This one has aged pretty well, as the issues being brought up are probably being faced by Christian kids today too. The acting was also above par for this sort of short.
I'm agnostic and won't comment on the subject matter, but it's a well assembled 28 minutes whether you believe in the premise being presented or not. The copy I saw on Youtube was a little beat up and had some sound drop-outs, but overall was very watchable.