Someone who habitually stalks people who post videos on You-Tube. They watch their videos so much that they feel they know them personally. Leading to attachment and stalking this person, his/her channel online, other videos related to this person. Serious cases can lead to stalking this person on twitter and facebook.
"OMG Sally, stop you-tube stalking Justin Bieber!"

"I'm such a YouTube Stalker! All I do all day is watch Nigahiga videos."
by Word Boss LA December 7, 2011
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