This plugin works as advertised:

Once installed and activated, just add the parameter to your content and it's there.

Positives:
- very simple
- easy to use - the built in documentation opens a popup with all the possible media to use the plugin for
- works as advertised
- very nice lightbox effect

Negatives:
- the only visible element on the page, is a small icon, so you have to add some kind of instruction to click on it.
- no parameters. I would have liked to be able to set the size and position of the display. Maybe this can be built in in a future release.

All in all - very neat and uncomplicated.
Thanks to the developer.

Works as announced but seems to lack a crucial feature. It is not possible to link image thumbnails to the videos.