http://darkerastudios.weebly.com/index.html

The artwork in this trailer was done by the infinitely talented artist DragonGirl983
Seriously, check out her work, she's amazing. Have a link to her DA
http://dragongirl983.deviantart.com/

Here's the picture in this video: http://dragongirl983.deviantart.com/art/My-Little-Pony-Rise-of-the-Clockwork-Stallions-395574246

This is the artist that made the amazing logo for Rise of the Clockwork Stallions
http://linkslove.deviantart.com/
She's also awesome, and deserves some recognition for being so.