Although there are many references to the first film, some plot points are expanded and others reduced, a tiny bit of updated old footage but mostly new footage. All this in less than 3 minutes as opposed to the original's ten!
(As mentioned in an earlier post, the Hamlet puppet had some inspiration from a certain B&W film.)
...and the film is on its own page at the side.
ASIDE: "Hamlet" is an easy word to misspell on a typewriter (an ancient form of human-powered word processor)...on an essay I wrote for high school, the title page proudly proclaimed "HAMLEG".