Moodle in English: Prevent piracy - add watermark with user username to videos

Security and privacy

Prevent piracy - add watermark with user username to videos

by Joana Pauperio - Tuesday, July 21, 2020, 5:47 PM

Hello!

Do you know if there there is a plugin we can use to add a dynamic watermark with the user's ID/Name/Username when they are playing videos in moodle? I would like to prevent users from taking screenshots or record the video by adding a watermark with their username that they couldn't delete afterwards.

Thank you very much for your help,

Re: Prevent piracy - add watermark with user username to videos

by Matt Bury - Wednesday, July 22, 2020, 2:04 AM

Hi Joana,
As far as I know, the only way to add a permanent watermark is to recode the video. That's a CPU & GPU intensive task. To give you an idea, upload a video to YouTube. YouTube will re-code your video from the moment you start uploading & it won't be ready to playback for several minutes after it's finished uploading. YouTube uses dedicated, optimised, high-power servers to do this. Now imagine how long a regular server will take to do this. And then think about how easy it is for someone with a watermarked video to simply blur the text so that it can't be read.

You can easily add a temporary overlay watermark as a subtitle/caption & this will show up in screenshots.

I hope this helps!

Matt

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