I grew up watching Monty Python in the 1970's, during it's initial run in the US on PBS stations. I liked the show even when I didn't exactly understand the jokes.
I distinctly remember seeing the preview for Monty Python and the Holy Grail at some movie I went to with my grandfather, and him laughing at one of Terry Gilliam's animated bits. (They probably shouldn't have been showing the trailer at a movie a nine year old kid would've been at, but oh well. I thought it was funny too).
Several books have been released both by and about the Monty Python crew over the years, the most interesting ones to me being the early ones by them. In that category falls Animations of Mortality by Terry Gilliam, released in 1978. I distinctly remember seeing this when it was released in the Economy Book Store in downtown Syracuse NY, flipping through the pages looking at the familiar animation figures he had created mostly from cutouts for the show. I never saw another copy again until I tripped across it on Ebay and snapped it up for less about cover price - a great deal since Amazon sellers now sell it for 80 dollars and up.
Inside much of the book described the process of making animated films - mostly with tongue planted firmly in cheek, to say the least. In "Animation Lesson 3" up top, Gilliam outlines the method behind the clip and assemble animation that he, well, didn't pioneer, but certainly brought to a new level of legitimacy on Monty Python. Enjoy.