Thanks for the comments Paul, Brian, Derek and Al.
I managed to grab 5 avi’s during the session and one of them had a larger file size, so I figured it probably contains more detail. It was the one where I paused and re-started recording several times in an attempt to capture the best seeing.
The final image was 229 frames from 2000. Using the Baader astro photography solar film helped me keep the exposure at 1/2000 sec with Gain around 300 – quite different to typical Lunar and Planetary settings!
Cheers
Dennis