I have front and rear facing cameras on my bicycle (Following an incident where I had to defend myself against physical assault...successfully I might add) and I fancy that other road users are more aware of such things nowadays, as you don't see quite as many passing within inches, as you once did (I have had paint on my pedal before now). Of course, I pick my times and pick my routes and am sure that people who drive or cycle, in cities, will tell me it's as bad as ever. I've not had cause to send in much footage but have noticed that different Police forces act in different ways (It seems Dyfed Powys are more likely to take action than South Wales Police).
I have considered getting a dash cam for the cars but my cycle front camera has a very good run time (It doubles up as a 400 lumen - not very big lumens I fancy - light but I never use that bit of it), so I may look to make a mount to fit it in the car. The same could be said or the rear one but I think frontal accidents are more contentious than when someone comes into the back of you (Unless they are able to drive off after coming into you). Perhaps I could fix both up but I think the front one more important.
As to the issue of enforcement of rules, first it is said that rules are there for the obedience of fools and the guidance of wise men and I think it less hazardous to run an amber light, when committed, than stop suddenly, especially if there is someone close behind you. Without scrutiny and risk of sanction, there are those who do just as they like, like those who still drive with a phone in one hand and the other on the wheel.....with their eyes on the phone if they are texting

. It's rather like Drakeford's flowchart 20mph speed limit; there was nothing wrong with the old 30mph limits, other than they weren't enforced. Now, most people are simply 10 mph more over the speed limit than they were and those, who stick to 20, are now more likely to be overtaken, than when they stuck to 30 and those overtaking, are going faster than they were when tailgating someone doing 30

. There are some crazy anomalies too, such as a wide and straight road, with a 20mph limit and a narrow, hedge lined one, leading off it (Favoured by dog walkers and horse riders), where the limit is 60mph.