I remember seeing the original video a while back and I was blown away by the concept:Both Luna and Celestia have turned evil, and their former guards rise to defeat them.The whole concept was brilliant and it inspired me to create the evil versions of Twilight and Cadence. Not only that, but I also created a storyline with a similar premise.
Twilight has now turned to the dark side, and Spike, her closest friend and royal advisor,leads a revolution against her before she can enslave all of Equestria. Using the Staff of Sacanas, Spike approaches his former Princess and takes his last stand against her.