An episode of "The George Burns and Grscie Allen Show", an early and popular live TV comedy. This episode sees Gracie creating a lot of confusion for a Tax man. My source says this aired 1 March 1951. It may be wrong, though. As usual, the picture quality is somewhat poor, due to poor source material.
You can stream Classic TV Comedy: ''Burns and Allen'' - (Episode Title: The Income Tax Man) (1951) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.