I'm surprised that no one has identified the source of this "short", which actually is an episode of~Ta daaaaa!~Rod Serling's Night Gallery
It's part of an episode that is comprised of these:
The Boy Who Predicted Earthquakes/Miss Lovecraft Sent Me/The Hand of Borgus Weems/Phantom of What Opera?
(original broadcast Sept. 15, 1971)
A boy's gift for prophecy pressures him when he forecasts disaster.
A babysitter is alarmed at her clients' behavior.
Peter Lacland asks his doctor to amputate a problematic hand.
A comic twist on "Phantom of the Opera."
By the way, the actor's name is spelled "Nielsen". His name generally is misspelled as often as Nicolas Cage's, which often is written as "Nicholas".