I just use the glue on mounts and be done with it. I think the way the guy has his camera mounted would obstruct his view of his dash.
The straps and clips look like the will add to congestion in my helmet. There's already 2 microphones taped to inside the chin i.e. one for the camera and one for my intercom.
I see overtop of the camera to my dash, so it hasn’t been a problem. The straps actually hold my mic in place inside the chin bar, so it does double duty. I too have two mics in my helmet, in the video you only see my Sena mic.
For the most part I agree the glue on mounts are the way to go, having said that, depending on the curvature of the helmet, it can be a challenge to glue them on without modifying the mount. I found this product a good alternative, if one wanted to have a camera from this view point.
The other reason I wanted my camera just a touch further away from my helmet is I can quickly see if it’s actually recording. Sometimes I have to press the remote record button twice to activate record. This happens when the camera goes in sleep mode, press once to wake it,second to record.