Hearing what what she was telling him would have made this video that much better. I've heard those encouraging words before, and all it does is make it worse.
No sound? I would imagine she was saying a few encouraging things to him which probably was more humiliating the helpful. Would love to hear her telling him that all he has to do is make that soft penis into a hard cock so he can fuck get tight wet pussy. Hearing the disappointment in her voice and the added pressure to perform and I would just shrivel up into a pathetic little nub.