Can’t imagine a significant number of users ever accepting this solution, there’s too much hassle involved.
Users who are not attempting world record attempts or playing tournaments where money or fame is on the line.. in other words.. 99.99% of the user base will have no incentive to bother with webcam hand recording anti-cheat systems.
They will just move onto another less bothersome game that doesn’t require it, and that game will eat the webcam-required always recording game's market share.