"The Slender Man is a creature that had been seen many centuries ago, mostly in Germany and Egypt, but most believe that the Slender Man has been in Brazil as well. No one knows if it is actually real or just a legend created by the Egyptians or the Germans, but my grandmother (who is German) told me stories about the Der Großemann (or Tall Man, if my words are correct), who is also the Slender Man. The Slender Man was said to be, in Germany, a fairy that scared children out of the dark woods and punished them, which would explain his many limps that look like tree branches. He would continue to follow the children until he has captured them or the children would confess their wrongdoings.
The Slender Man is called a man due to his male appearance, but many think he is an "it", for they cannot comprehend what this being is.
As for the sightings on YouTube, you must interpret was in real and what is fake. Some people dress like him to scare others, but the true picture of a Slender Man should be:
1. Extremely tall, 7-9 feet.
2. Very long arms and legs.
3. Multiple arms and legs.
4. A white head with no facial features. If you see a "dark mark" where the nose should be, then it is someone wearing a mask and dressed as a Slender Man.
"

"I have made a creepy film trailer called tall and dark."

"slender man would not kill the children then he is taking them and forcing insanity upon his victims and possibly killing the children or consuming them i doubt that is a truth behind slenderman,"

"what i don't understand is why the slenderman hasn't ben as big and reknown as other mythical creatures. but i don't think that he or they are children of angels and humans for the reason that he was said to be a fairy that lived in the forest but if you can support your claim with any evidence i would like to hear more."