Either you have posted link to a wrong video or we have a very different experience when it comes to moaning.

Onomatopoeia? Sure it is there, and some fillers (or whatever you call those little sounds). But moans?

The first <sigh> does sound a lot like a moan. OP linked to the timestamp so I missed it when it first played. I was also confused but on second playback I heard the first <sigh> and also thought wtf.

I would not want that in my product.