bradr wrote:
I tried it saving to an avi and a mov...
I don't understand "saving to". I use "Record as", and have just recorded the same wildlife webcam, which is displaying on my desktop, in both avi and mov and the files play absolutely fine.

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I am no expert but I do a lot of screen-capturing and have found that mp4 is the best "bang for buck" - avi recordings tend to be less easy to edit and I don't see much, if any, quality difference - and do mov files require QuickTime? Can't remember, but I can do without that cluttering me up 😉 -