I’m not sure what value a camera would have in preventing this accident. The PIC was by definition a professional pilot and the expectation is that he should give it a go unless there was good reason not to. He was IFR rated for a reason.
My experience of Lockhart over 3 years is that it’s tropical and if you don’t like the weather wait 30 mins.
Cameras have their usefulness in determining VFR conditions and should be encouraged in that context. Their usefulness is limited in determining whether the cloud is above or below IFR RNAV minima.
The METAR. AWIS and talking to UNICOM operator are many many times more useful than a webcam image