Make a gif
Split your video into frames.
1d=$(mktemp -d)
2cp $vid.mp4 $d
3cd $d
4
5ffmpeg -i $vid.mp4 -vf "fps=10, scale=360:-1" frame%04d.png
6gifski --fps 10 -o ${out}.gif frame*.png
Optimize:
1gifsicle --optimize=3 --lossy=100 -o ${final}.gif ${out}.gif