There were a HUGE amount of videos made in GMod with MLP and TF2 made after KPShadowSquirrel first made 3D models of the Mane 6 back in 2011 or 2012. Many of them are still up on YouTube.
Source Filmmaker allowed for better-quality animations, but some of those old GMod videos were nothing short of berserk masterpieces:
Source Filmmaker allowed for better-quality animations, but some of those old GMod videos were nothing short of berserk masterpieces: