Canon 2X teleconverter with 60D and 70-200mm test

Is it worth getting a teleconverter? Non-scientific test of the Canon EF 2X II extender (teleconverter) on a Canon 60D with Canon 70-200mm f2.8 L IS lens. This lens is a Canon classic so in this test I have a quick look at what kind of image degradation we might experience if we add a teleconverter and are we gaining more image detail than without the extender.
I need to add that these Teleconvertors do a lot better on Prime Lenses - like a 300mm or 400mm Prime - I plan to do a video with one of these in the near future.
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Видео Canon 2X teleconverter with 60D and 70-200mm test канала kendpc