I'm certainly up for either a Winter-themed Quest or a Mongol-themed quest; however, count me out of YouTube - I live with a dialup connection and have more important things to devote my bandwidth to.
Maybe an Alchemist's Lab quest, to determine the strange and unique concoction, items, and tomes that might reside in such a fascinating place.
Or perhaps a Classic Beginning Quest, wherein the subs need to relate to the tradional and vastly overused adventure opening of 'So you're all in a bar...'
Or a Rider's Quest, wherein the subs relate back to riding, somehow - although not necessarily horseback riding.
Or a Scribe's Quest, brining forth new scrolls, tomes, codices, engravings, parchment collections, and such that might be found in wizard's towers, old libraries, bard's pouches, birdcages, and other odd places for a bit of writing or artwork to turn up.