The process of making this video went something along these lines.

Two days ago I heard Freebird on the radio, and I thought of how much it'd fit Rainbow Dash.  Yesterday I decide to make the PMV.  Today I sit down at around two PM and for the following four hours I worked on the PMV.  This is the result, I put in more work with this PMV than any of my others, but that's more likely because it's just longer than any of my other PMV's