Kdenlive is incredibly powerful but a bit difficult to use, like most FOSS there is a bit of a learning curve: https://kdenlive.org/en/

Signal has a built in tool that does what you describe but I think that is only for images, but may also work for video.

Reply to this note

Please Login to reply.

Discussion

Great, I'll look into it. Didn't run across this one when I was searching earlier. PV 🤙

Do you know if an interested party could ‘unscramble’ the masking filter? Since KDEnlive is open source code, I’d guess that the pixelation algorithm would be viewable and potentially reversible - but maybe there’s just not enough data in the video file to do so.