Hello,
on this topic I only foundold posts where it do not seem to work to set your watermark on Videos.
I saw that in PHP-motion (which is free!) you could get watermarks. Below is the howto.
http://www.idude.net/index.php/how-to-watermark-a-video-using-ffmpeg/
What stops Dolphin for having the same possibility to add your own watermark logo to the Videos?
Is there anyone that have it working for them?