Yes, funny play on giddyup. Very neat name. I don't see a large sales value at the moment since you'd have to really, really push it hard to get 'someone else' to see a good idea for it, buy it and develop it; but if you're into dev'ing yourself, it's snappy and fun and an ideal name for a fun vids site. Especially, with that 'up', possibly a Digg.com - style voting atmosphere? In fact, I think I just gave you your marketing plan right there, ha. With all the good templates out there, a good programmer should snap you out a vid voting site for a few hundred clams, one that even reformats different vid files so they all open identically onsite.
If someone gets the idea right away, even undeveloped someone might like this name enough to pay in the low xxx range, in my opinion. If I wanted a (nother) site like that, I'd pay for that name. Nice one.