Add watermark using FFMPEG:
>https://write.corbpie.com/how-to-do-a-text-watermark-in-ffmpeg/
>https://ffmpeg.org/ffmpeg-filters.html#drawtext-1
If anons remember back when the bot was able to decimate the board with book text etc it was because of uniqueness. Unique sizes, unique hashes etc. That is how to do it. Get creative.
FFMPEG is free cross platform:
>https://ffmpeg.org/
>https://ffmpeg.org/download.html