I never made youtube thumbnails, but if I had to, I’d take 100 paint.nets and 0 gimps. Everything a youtube thumbnail ever needs can be easily done in a few minutes in paint.net. It’s like a standard toolbox for graphics.
GIMP is almost designed to be passive aggressive and sometimes hostile to its user. Last year I had to regularly process some images in gimp on linux (cropping, composition, other basic ops) and seriously considered installing samba, qemu and windows only to share these pngs with paint.net. I can’t even fathom the pain of having to do something like a thumbnail in it.
https://www.getpaint.net/download.html
https://www.google.com/search?q=paint.net&tbm=isch
GIMP is almost designed to be passive aggressive and sometimes hostile to its user. Last year I had to regularly process some images in gimp on linux (cropping, composition, other basic ops) and seriously considered installing samba, qemu and windows only to share these pngs with paint.net. I can’t even fathom the pain of having to do something like a thumbnail in it.