It appears that the actor on the viewer's right has removed the handle from the wooden base of a push-broom and is "playing" the shoulder of the wood, with the bristles projecting forward.
Not sure what the guy on the left is "playing".
--- John Kerkhoven <solo_danswer@xxxxxxxxxxxx> wrote:
> An old, cornball harp-comedy clip where the actors are certainly not
> playing the music.
>
> But what are the two guys on the outside playing (or pretending to
> play)? Are these harmonicas with some sort of attachment to project the sound?