That actually seems like it could be a practical application. It would probably work best on cameras due to the heat generated from operation though. It would in theory show odd heat distribution/dissipation on a outlet if it was not structured in a "standard" way.
Those devices are often wireless though so that's why you see those "bug finders" with the antenna on them to "sniff them out".
I've done a bit of research and this device in the video does not have a clear enough image to be useful for this application. It would be better to cash out 300$ - 500$ and get a more advanced device. I've been considering using this in combination with a bug detector.
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