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Peter,
I had a go at your first video. Because this is Beginners Astrophotography, I'm going to spout some advice (although I am by no means an expert!).
Firstly, I expect you are mindful the size of files you can upload, but the number of frames in the AVI is way too small. If that video had about 2500 frames in it, the result could have been much better.
I stacked 75% of the frames in AS!2, using about 15 alignment points, mostly along the rings.
Then I wavelet sharpened in Registax 6. I went quite far, which introduced a lot of noise. This would be better if there were more frames.
I also did an automatic RGB align in R6.
Then I did a noise filter using the Wavelet noise filter in Fitswork. I was quite aggressive, as there was a lot of noise from the sharpening.
I brought the result into Gimp, and did a colour balance adjust to get a neutral B ring (++blue, --red). Also did a bit of unsharp mask.
Then I added a mask layer to clean up the background noise.
Final result I think suggests you could get a decent image out of 2500 frames or so.
-Ivan
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