So anyway, if you view the videos in a separate window (which I prefer), I noticed that when trying to scrub forwards or back using the control at the bottom of the video's window, it was pretty slow to respond and difficult to control exactly where you wanted to be. Well, today I discovered that if you move the window aside (or to your second monitor, as in my case) and switch focus to the controls at the top of the main iTunes window, you can click and drag or simply click where you want, and the video responds instantly! Not sure why, but it's a dramatic difference.
I'm not sure if this qualifies as a serious hint, but it seemed like a subtle thing that made browsing these vast libraries of video (particularly ones like Apollo Pony) much easier.
[robg adds: I can confirm that there are definite issues in using the slider at the bottom of a separate iTunes video window -- trying to even jump ahead with a click causes my G5's CPUs to peg, and I see the spinning beach ball. When I use the controls at the top of the iTunes window, there are no such issues -- response is instantaneous. This seems like some sort of bug in iTunes' handling of video in separate windows, given that it works fine with one set of controls, but not the other. Note that I added the above links to the podcasts; I didn't screen any of them (other than RocketBoom, which I subscribe to), so I don't really know what you might be getting if you click :).]

