I’m deciding that Treo video works great to capture snippets of video, useful for things like video blogs (ie., throwaway video content like what I’ve been making). And it’s useful to quickly capture a thought, an action, etc.
But is it useful for a library? That depends. What is it you plan to do with the video? If you’re planning on using the Treo to film your online bibliographic instruction class, I’d say you’re nuts! You probbaly need better-quality video for that (or even screencasting software like Camptasia, depending on what it is your’e doing).
But how about for teens capturing a library event? Or librarians doing something a little more informal? Then yes, mobile video works well for that.