My First [PMV] See below for the meaning of the video and the artist.

Break On Through (To The Otherside) By The Doors

This video is defining the change between Twilight Sparkle being a shut in to becoming someone social with loyal friends, and how she broke through to a new and wonderful world. It shows her getting annoyed by her new found companions, but in the end, discovering that they are more to her than she knows.