For the Zi6 at HD 30fps it looks to be about 1MB/sec of video. So a 4GB card would be about 68 minutes.

Yeah, it's sped up a bit. I wanted to speed it up more but I only shot 90 seconds of video.

Thanks a bunch, Jason, for a couple of sleepless nights.

I didn't realize this was more of a DIY New-York-hommage to "Koyaanisqatsi," than a demo of Kodak Zi6's HD-picture quality (John Gruber certainly implied that, and there aren't, as yet, many such around on those intertubes of ours ;-)).

So I tried to determine whether the apparent jerky people movements on the street were perhaps(?) an artefact of your enhancing it with separate sound afterwards, and (could be) mixing up some timecode or something. Because at my end, in 50Hz-power frequency Europe, it clearly looked artificially speeded up by a factor of [60fps/50Hz]=1.2. Glad you cleared that up; wish it was stated explicitly from the beginning THIS IS NOT YAZI6DEMO.