It's been awhile since I explored all the options on the Live CD. I think you're video is hanging up on the GUI splash. If you can find a place to enter a boot option, you might try "vga=791" for starters -- that is a probably a lower resolution than your video is trying to default to, and might allow it to display the splash.
If you're seeing a text prompt :ubuntu@ubuntu$" then that's the Command Line Interface (CLI) and you can log on there. I forget what the Live CD demo user's name is -- maybe "demo" or something like that? If you can log in, then run
Code:
sudo dpkg-reconfigure xserver-xorg
Code:
startx
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