I've attempted to correct the audio for the voices. I believe you are hearing a woman doing the man's voice and a man doing the woman's voice.
Clues to the Identity of the :
- The use of Arial rather than Helvetica for the text at the end. (probably not done by a graphic designer)
- The Hanes logo on the inside of Margaret Thrasher's mouth.
- The puppets sometimes fall out of frame but always return to frame after a moment. This tells me that they have a decent sized monitor to watch themselves in. Mostly this is a screen of a laptop since the color also looks roughly like the quality of a built-in iSight.