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I'm not sure you are in closed loop in either of those videos. During closed loop the O2 sensor display should be switching between rich/lean very quickly. Also I'm not sure most cars can idle at 14.7 afr especially cold. Its usually something much richer, thats why there is an airpump to push O2 into the exhaust directly and burn off the excess fuel before it hits the atmosphere. Also, I would take any reading from a narrow band O2 sensor that is not switching very quickly with a grain of salt. Anything more than + or - .1 AFR and and they get extremely inaccurate.
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