OK, OK, BEFORE YOU START BASHING ME:
He was a late yearling. I rescued him in June, and I sold him in November. He was breech and pulled, orphaned, and thereby stunted, but vet records show he was born in December. So he was 18mos old, and yes, I put a synthetic 12" child's saddle on him to see how he handled being cinched. That saddle weighs only 112oz (7lb) and was never used with my sister.
In the beginning of the video you can see 3/4 other people standing off in the background. My friend/trainer Barry shot another video at the same time, and his was better quality, so it would have been the same video, from a different angle of my sisters playing with him.
I wanted to see what he was capable of, and I make sure that every single one of my horses has ground manners and at 18mos can be cinched and ponied. My little sister, who is now 8 and only weighs 48lbs. Two years ago, you're looking at about 38lbs or less. I don't feel bad for having my sisters pony him like that, as it was the first and only ride, and he wasn't "working" or being "pushed." He is sound and healthy to date, and was sold to a very responsible friend of mine, as I won't sell a rescue to just anyone.
Sorry to get everyone's panties in a wad.
Please don't bash me for being proud of the fact that this colt was quiet.