Hi, I don't think I have a USB stick, will a burnt DVD do?

I have a couple of movies that do it, not that many though.
My PC is wired in to the router, the xbox is wireless.
TVersity just seemed to work. I tried to get the windows extender to work which I did but it was very, very slow through the menus etc. Is there a step by step guide to getting it working via other methods then?
I am almost positive you can use a cd or dvd to hold a movie file and play it on your xbox 360, test that first.
then I would try to connect your xbox via WMC because it requires 0 transcoding and with your computer doing no transcoding at all we could eliminate that as a possible reason for the loading bar issue. to set it up its pretty straight forward, power on xbox 360 and pc, open wmc on your pc, go into the xbox dashboard and launch the wmc thing and take down the passcode it gives you and then input it on your pc. I use wmc because with the latest divx 7 codec, windows 7 mc can play mkv files and then I can stream them to my xbox 360.
but yea test your video by burning it to cd/dvd and let me know how it plays back.
also, how many computers/devices capable of accessing the internet do you have on your network total?