i've been using limewire for awhile now, and i have no problems when i drag the downloaded songs to my ipod. however, when i try to drag the movies i've downloaded, the cursor turns into a black circle with an arrow through it. what am i doing wrong?

What format are the videos? They'll need to be mpeg4 or H.264 for the iPod. So, if the videos are in another format, you'll need to use a converter

I'm using Windows XP & I use 3GP_Converter (free). Videora's another free one that's popular. If you're using a Mac, someone recently said that iSquint converter worked well.

There's heaps of info & links to different converters in the thread below.
How to transfer music to my iPod (& iTunes)