what video technology does mixergy.com use for its interviews?

what video technology does mixergy.com use for its interviews? I know it is Mac-based but I have not been able to find it in my Mac. An example of a video chat taken with "the technology" is available in this link:
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Guest [Entry]

"Andrew Warner at mixergy.com once answered someone who asked this question. He said:

The picture-in-picture layout is from Skype. The new format is from Ecamm,
a new recorder.

I suppose the recorder is Call Recorder from Ecamm."