basically, the setting you had were:
Sunset4
Delay is set to 15: 15 seconds delay between each photo
Limit Tv -480: Longest exposure is 32 seconds
Default Sv 384: ISO starts at about 80
Limit Sv 768: going up to about 1200
The final shots in youer movie are probably with ISO 1200, and that explains the noise..
The only way to keep noise down is to have lower ISO and longer exposures. The problem with going to longer exposures is that you have movements getting faster and faster in the video.
For example, if you have clouds, and you start with a delay of 15", in the day you have for example 15" of delay, 1/100th seconds of exposure, 15" delay, 1/100th seconds of exposure, etc...
if the exposure gets longer, you get for example: 15" of delay, 32" of exposure, 15" delay, 32" of exposure, etc. This means that the overall delay between photos in more than three times, and therefore the resulting speed of clouds in the video is three times faster.
If there aren't clouds, anyway, you can have higher exposure without annoying effects.
Sunset10: if you are doing sunsets, just stick to version 4, you won't get anything better.
