How to blur video?

Question

Design

There was a need to simply blur the video, but I don’t know how to do it in the fastest and most convenient way.
Can you tell me, please, what programs / services can be used to do this?

Answer 1

ffmpeg -i input.avi -vf "boxblur=5:1" blurred.avi
https://ffmpeg.org/ffmpeg-filters.html#boxblur