Updated with videos!
Also, this might come in handy soon.
And, I'll move my drink pairing up from the comments: I actually have little idea what jousters drank, so I'll pair it with a drink from Merry Olde England, Samuel Smith's "Oatmeal Stout." With the brewery only founded in 1758, it's unlikely to have been part of a tournament champions celebration, but some horse cavalry might have enjoyed it. Should stand up well for sieges, too.
Update 2: Grim brings us up to speed on jousting beers and suggests a hoppy lager. None actually spring to mind. I'll have to go looking for one.
Also, check out these Shire horses Samuel Smith's uses for deliveries. Beautiful.