dustin-shappee-weird-thing's message to us reads:
"After much research (by which I mean play around with google custom search when I was bored,) I found the first PMV! MLP premiered on October 10, 2010, and this video is dated October 30, 2010. I am so happy, and I want my cookies to be chips-a-hoy."You can watch it below.
Dustin's logic seems sound, as by Halloween 2010, there was barely a fandom at all, and what there was was restricted almost exclusively to 4chan's /co/ board. There also were very few episodes even aired yet, as the premier was only 20 days prior to this video's posting.
The video description reads:
Uploaded on Oct 30, 2010"Trouble is a friend" and there's nothing My Little Ponies love more than FRIENDS! Lots of Night Mare Moon in this one. Because she ROCKS.
Lauren Faust's My Little Pony: Friendship Is Magic + Lenka's Trouble is a Friend.
Music from Lenka.
Video from Pensive Pine ( http://www.youtube.com/watch?v=Tjl8Xu... ).
Until proven otherwise, this may be regarded as the first PMV ever produced.
SweetieBot has shown us another PMV which predates this one by 1 day
And by THIS one from the day before