Well, based on this thread, I downloaded and tried out Video Center. I have a problem, though, that pretty much kills any potential use for me. If I change the setting to store video on my memory card, clicking the download button on any video item causes video center to go to lala land, requiring me to kill the app. If I leave it set to use the internal device memory, then download works, but it will only take a couple videos to fill up the internal memory on the N800. Thus, the whole idea of 'download videos to have while on the go' doesn't work.

My memory card is a 4gb card in the internal memory slot. Anyone else had success with downloading to an internal memory slot card?