I am with compressor stall on this regarding web cams. My experience of them in cloudy weather is that they will show you just that - rain, clouds but at what height? Unless the camera is pointed at something like a hill with a known height then it is very hard to determine the base.
I go back to my earlier post; there is now so much new avionics out there that can make these approaches so much easier and safer but for a variety of reasons we are not using them. How much of a difference would a synthetic vision based off a terrain data base have made in this situation. I know they are not to be used for navigation purposes but it would have brought to the pilot's attention that he was closing with the ground.
This equipment is expensive, more so because the idiocy of regulatory compliance in this country to install non-type specific equipment. However, the costs of a fatal crash are infinitely higher as this operator is about to find out.