Now back to the fan project. It features a song written by the PonyPhonic, a group (duo?) that writes MLP fan-songs and animation by a group of fans headed by WarpOut. It took 2.5 years to complete, coming out in May of last year. Both are based on the background of Princess Celestia and Princess Luna, specifically Celestia's feelings about Luna's fall into Nightmare Moon and subsequent banishment to the moon.
Understandably, given the subject matter, it isn't very happy. I cried the first time I watched it. But it didn't feel like a bad cry. Just appropriate.
Both the song and the animation are beautiful.
Grab your tissues and please give it a watch.