Youtube thumbnails in 3 minutes using native MacOS software

[@supercurioTube]

Simple and effective, thanks for sharing!

[@survivor303]

Kdenlive: save frame as. Open it to gimp, add some effects to it, like dark corners, add text to it, with some font sizing, export to jpg and voila. :) All takes couple of minutes and you are done.

[@zxspectum]

Thanks I was about to ask the same how to in Kdenlive. So good to know!