AVI files are huge because the video is uncompressed. Makes it somewhat impractical for basic internet viewing but very good for frame by frame analysis.
I agree that .mov for quicktime is a nice quality/file size compromise. The only downside is windows users need to install the codec.
Larger Mpg2 files are also good, but windows media player is hit and miss.
We will probably settle on high quality wmv and mov formats from internet viewing and Mpg2 for downloads.
AVI for individual swing analysis will be the preferred file format, but the vid's will need to be very short and sweet to keep the file size down. Like in the 20 second range per clip.
My current thinking is 2 minute clips with MPEG2 and Quicktime.
I may be wrong, but I think what you would like to see are swing sequences which typically last just a few seconds from startup to finish. Those could be .avi but you will find that standard media players like Windows Media Player are not optimized to catch every frame, even in raw DV/AVI format.
For instance, viewing the release sequence on a full swing, Windows Media Player may show a single, somewhat blurry frame. I've found the best tools for viewing avi frames are swing analysis packages which show at least 3 very clear frames from the club at parallel to impact at 1:4000. I use cSwing. But there are many low cost alternatives.
If you have any suggestions let me know.