This rare animated short can be found as an Easter egg in the "Walt Disney Treasures: The Chronological Donald, Vol. 1" (1934-1941). It later appeared as an official bonus feature on the follow-up DVD, "Walt Disney Treasures: The Chronological Donald, Vol. 2" (1942-1946).
Donald sings "Heigh Ho" from 'Snow White and the Seven Dwarfs.'