the "Disc World" Series by Terry Pratchett.
His comedy weaves the medieval (and yet, modern politics) in an entertaining and interesting way. 41 volumes each about 300 pages.
Can be read in any order, but if you can read them in the order written the stories make a solid impact. Starting with the "Colour of Magic".
I believe videos have been released in Either Live action or Animation.
Soul Music, 1997, an animated series by Cosgrove Hall.
Wyrd Sisters, 1997, an animated series by Cosgrove Hall.
Hogfather, aired by Sky One, Christmas 2006 as TV film.
The Colour of Magic, aired by Sky One, Easter 2008 as TV film.
Going Postal, aired by Sky One, Easter 2010 as TV film.