[petercooper]

That said, people I've discussed screencasting with (nearly all in the Ruby community) have typically recommended video first then a voiceover - this includes Geoffrey Grosenbach of Peepcode (he also shares this technique in his screencast about screencasting).

I tend to do everything in one take then edit out the mistakes so I haven't got an informed preference, though doing the audio first does seem to make sense from a pacing and "maintaining interest" perspective.. you can always edit down/speed up the video parts, after all.

I suspect that merely being detailed enough to think about these processes and how they work (or not) for you is enough to put you above average in the screencasting stakes.

[mhartl]

The Rails Tutorial screencasts (http://zfer.us/EKm97) always combine audio and video from the same take (using ScreenFlow, natch). I can't imagine achieving a good teaching cadence any other way. I also love the verisimilitude of hearing mouse clicks and keyboard clacks synchronized with the action on the screen.