The plot is minimal, the favorite brother is sold by the other 11 brothers to slavery. He is seduced by his owner's wife, goes to jail, gets out of jail as he can interpret dreams for the Pharaoh.
It was a pure joy to watch, a real opera, sung throughout, funny, colorful, and profane.
The Pharaoh is played by Elvis, with all the mannerisms and body language. An inspired idea. The Jewish/French Music Hall version of Those Canaan Days sung and acted by the brothers was to die for; perhaps the best part of the whole show. The tune sticks with you.
The show was pythonesque. Monty Python was on TV in the UK from 1969-1974. It was created and evolved at the same time and place, the same cultural influences; art is not created in a vacuum.