How do I get video thumbnails on Ubuntu

 

sudo apt install ffmpegthumbnailer

sudo vim /usr/share/thumbnailers/ffmpegthumbnailer.thumbnailer 

Exec=/usr/bin/ffmpegthumbnailer -s %s -i %i -o %o -c png -f 

file save

and rm -R ~/.cache/thumbnails 

source: https://askubuntu.com/questions/1112728/how-do-i-get-video-thumbnails-on-ubuntu-18-04-1-lts?utm_source=pocket_shared