I don't get you, man. Just don't.
They gave the angles at the beginning of the video. dick, straight on, and upshot. They obviously used "dick" when she was doing the blowjob and when it poured out of her mouth they cut to upshot because the dick angle she went up to high. The straight on angle would only catch the top of her her and the upshot was really going to show nothing but hair.
Don't buy that explanation. It's plausible, but it doesn't make much sense. As she was transitioning from the countertop level to fully upright the image would have been better captured on the dildo-cam and straight-on cams. At the end of the transition, yes, the upshot would have been the most reasonable choice. It was either calculated to obscure, or it was just lazy editing.
The thing you guys seem to keep missing is that if he was not involved and "play time was over", this video would have sucked. It would have been another boring mouth the dildo video. Go watch the previous blow job videos and tell me those are better than this one where he forces her hand and actions to be sexy.
She's been doing this job for more than 12 years - she knows perfectly well what sexiness is all about, she's just choosing to do as little as possible. Whether he needs to be there or not is secondary to the outcome of what actually ends up screen. Besides, even if Mumblez was goading her along, he could have editted himself out of the audio and as well as removed her reaction responses to him. Fact is, with a static cam setup he doesn't have to do shit except pump jizz. If he insists on being the camera man and editor, then his job just consists of setting up the camera, sound and lighting, getting the framing right, pressing record and then stitching it all together in the editing room. For her, she needs to have a script, or at least a rough plot of actions that get her from A-to-B-to-C and then she follows it. Or here's an idea, toss the script, screw the plot, and let her just pretend like she's really fucking someone...*boom*...instant improvement.
It's literally one of the easiest jobs in the world.