I have not stopped laughing, after watching this ten minutes ago.
Yes, it's a silly animal vid, but holy shit you gotta watch this to the end.
I've seen other vids of horses playing with balls and other items, so I was aware that they are creative, playful animals, seemingly like giant dogs, but this guy's enthusiasm trumps all.
The. Happiest. Horse. Evar.
Topped off with the most confused horse face evar near the end. :)