Marble Hornets is an amazing webseries on youtube that I recommend all of you watch, if you're not already.
It deals with the slender man, so that should tell you why I like it right off of the bat.
"part 1" is based on Alex Kralie, who is the original character to be stalked by the Slender Man and would tape himself constantly, before moving away and never being heard from again.
"part 2" is about J, a friend of Alex's who obtained the volumes of tapes Alex had used before leaving. He soon becomes entangled in Alex's dilemma and is eventually hunted by the Slender man and a strange masked man, who we like to call "Masky" J is considered MH's "narrator" but, he's becoming more and more unreliable, it seems.
Each part is a separate painting that is 10.5x7 inches and painted with watercolours