I doubt any technical control will solve the ephemeral picture problem because of the analog hole.
For this specific technique, if a photo of the screen doesn't defeat the dithering (in my quick tests the photos were worse than what I could see on the screen but better than either of the component frames [1]) you could reconstruct the image from a movie fairly quickly.
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An interesting technique, I think it's cool.
I doubt any technical control will solve the ephemeral picture problem because of the analog hole.
For this specific technique, if a photo of the screen doesn't defeat the dithering (in my quick tests the photos were worse than what I could see on the screen but better than either of the component frames [1]) you could reconstruct the image from a movie fairly quickly.
[1] http://imgur.com/jA5f6