Very articulately explained!! Two thumbs up for the presenter. It would have been great to get the sources, both primary and secondary, in case any one wanted to delve deeper into it.
As to the creation of the peacock in order to appreciate the beauty of the male's tail (and possibly the dance for a mate), I lean towards it being a visual way to instill awe in the observer. Using a visual method to instill a feeling is an easy way to give example of how being virtuous would instill awe in others who witness your virtuosity. The awe of one who witnesses someone courageously rescuing another, as an example. Not to be in awe of another which inflates the ego of the seen, but as a way to entice the witness to take on the building of their own virtues. The gods placing beauty within the world evokes awe, "a feeling of reverential respect mixed with fear or wonder." -Oxford Dictionary