Always willing to test drive something new. First, why a rar archive? Ok for me but Windows users already have zip support, not a big file anyway, why not use zip.
The scripts. Windows or linux (which is what I use) are ok, onion-skin.scm a bit temperamental when it comes to layer names and visible-set.scm, well shift-click also toggles visibility.
The executable. Same as most, I never RTFM, I assumed, wrongly that 'Exporting Layered Gifs.exe is a Gimp plugin. Not so, it is standalone but generates errors here. see:
https://i.imgur.com/TwtqMSC.jpg I suggest you include those in your archive ( I see the executables are 32 bit as well).
The next bit is just comment on the video.
22 minutes duration, a lot of users will
go too long, click-off. (I did download it so I could scroll through)
Black theme and symbolic icons are not easy viewing. Active layers not easy to see, active tool not always obvious, Not wonderful.
Your video, there is an HD (1080p) version but default is 1280x720 The youtube scale down has left it a bit fuzzy. Not really necessary to see your desktop icons, maybe you can capture a smaller area.
15 minutes in, opens a command console for running the ....exe Almost impossible to see, try black text on white and bump the text size up.
Audio, very weak not easy to hear even with volume maxed out. I have come across this before with Windows video, .acc audio is not wonderful. What you can do is de-mux the video / audio, increase the gain on the audio, and re-mux . mp3 audio is fine for youtube. This a comparison original on left, 'normalised' on right.
https://i.imgur.com/pnJiF5W.jpg
To complement the video, and for people like me who just dive in, a short text file ( a read.me) with script / plugin explanations in the archive goes a long way.
