i bought the session and then bought an accessory kit containing various clamps etc. one of the clamps is one very similar to what you’re looking at.
in theory it should provide and alternative to the standard helmet mounting option.
i had a previous action camera which i mounted to the strap of my camelbak and the results weren’t brilliant to be honest…the camera could be heard constantly knocking against my helmet, to keep it secure you’d need to make sure the straps are very tight to restrict the movement…but how tight do you make the straps to the point wearing the camelbak becomes very uncomfortable?
i’ve still yet to find a way of removing the vibrations that make the camera footage look shaky…other than using the helmet and chest mount which seem to be the best options. i also have a wrist mount (the mount can be rotated) which looks good so i’m hoping that will give me an option