The Christmas Gift of Light also known as The Soulmates in The Gift of Light, whatever you call this cartoon about aliens trying to cheer Santa up it's very strange.
http://phelous.com
  / phelous  

Josh Rastia's original upload of the special:
   • The Christmas Gift of Light (1991) - ...  

Articles on the mystery cartoon search:
https://www.cbc.ca/news/canada/toront...
https://www.newyorker.com/culture/cul...