I've followed this tuturial from jijames to create a simple screensaver for the Cinnamon desktop environment that shows the ISS (International Space Station) HD Earth Viewing Experiment stream available from Ustream.

To use it just clone the git repo I've created on Github using:

git clone https://github.com/ceskobassman/webkit-iss-cinnamon.org.git

Then just copy the "webkit-iss@cinnamon.org" directory that you will find in the repo you just cloned to the following path:

/usr/share/cinnamon-screensaver/screensavers/webkit@cinnamon.org/

If you have any trouble or improvement please open an issue or make a pull request to the git repo.