Hi,
Richard Lester directed it.
It was a fun and nice movie, but it really was not as "original" as we make it out to be. But it was a way to bring the Beatles to the public that was just hearing about it, and due to that, it helped make the film better and get more attention.
But there was some serious precedent for many of the moments in the film, many of which can be found in more than 140 Goon Shows done between 1952 and 1964. The most visible example is the blatant copy of the running, jumping, standing still thing, which was one of the Goons best sound effects moments for 12 years, from running to China and back to any other excuse.
All in all, it was fun, funny and had weird things, but compared to the "imagination" that the Goons created, this was a visualization of the Goons, that could not be done with the Goons themselves, as Peter Sellers had by that time become a film star and would not be able to dedicate his time and effort to The Goons anymore.
Spike Milligan was never really "hurt", by the Beatles copy of his work, but he talks about it in an interview, and that one was done in 1968, when he was trying to co-op some money to save some elephants. All of this can be heard on an interview.
The silliness of the songs, that they created, along with Peter Sellers' very own solo albums (he was also a very good drummer), show some comedy moments that ended up finding a bigger venue later. The "stories" that the Beatles formulated for their "Christmas Shows" and in a way to Magical Mystery Tour and Sargent Peppers, is quite evident in the style that the Goons had. The sound effects were the driving moment THEN, because you had to imagine things with radio in the 50's and early 60's!!!!! YOU FORGOT THAT PART! So when a film like this comes out, it becomes massively big and important and "original", which is fair, but it also brought out the English/Brittish scene in comedy and other things that were not as well heard all over.
For the record, The Goons, are still heard on the BBC every week, and it's now 50 PLUS years, since it started. Several things were also connected. John Lennon's play was almost a complete take on "The Bed-Sitting Room" by Spike Milligan, a massively wild and out of control anti-war thing. And Spike's series of books on his experiences in WW2 where he met Peter and Harry Secombe (in Algeria!!!!!!!), is a massively funny and off the wall bunch of stories and events that make "MASH", look rather clumsy, but still good!
But it's worth seeing. You are getting a view of people IMAGINED was what "stars" were all about in the movies!