Using another caputure method and converting the file
So I tried capturing as mp4 and Avi format and than converting it to a GIF format using command line tools like ffmpeg, ImageMagick and some others which it is not worth mentioning. There I ended up with a partly better quality but the file size was much
more than expected. For 20 Seconds the file size was around 10 MB to 15 MB. Some tool event ended around 50 MB. I had expected a file of about 3 MB to 5 MB. So I wasn´t happy with this Solution either.
As example for the quality I show you this shortened one.