We use a dashboard camera on the company vehicle and it proves enormously useful. For example, it stops me from wandering off and doing a bit of shopping on company time. That saves me a bit of cash. I wouldn't have one on the bike though. I stalled on a one in four last night. I'd hate for you feckers to find out about that...
So the court have convicted the chap for doing excess speeds of 100mph+ but don't actually have any evidence that he reached those 3 figure speeds..Unless the chap admitted he hit those speeds. You can't use land marks to 'estimate' a speed. I have a Drift Ghost on my bike and its a brilliant bit of kit, but I'd never dream of putting anything on YouTube.