Since I was evaluating the cheap (<$200) "HD" type flash camcorders, you should take high-def lightly, which I fully understood going into it. The Insignia model that I ended up buying records HD at 1280x720 pixels at 30fps. The sensor is 5MP (2592x1944), so this means video is being created by some kind of interpolation between groupings of pixels. This is done probably because the sensor refresh rate or sensitivity is not really up to handling a 1:1 output at 30fps or higher.

Is the image really HD, no. Is it better than my digital camera or cell phone, yes.

The videos I took were ~1min long and were ~25mb. The format was AVI and they use h.264 encoding for compression. It was easy enough to edit in Windows Movie Maker on a 3yr old dual core athlon with 3GB of memory in XP.

Hope this helps.