Baldcyclist: " For some reason helmet cam'ers seem to be involved in more incidents than the general cycling populous. Are they just unlucky? Or do they feel a need to feed their audience?"
Whilst it could be that they are unlucky, I'm not sure how you can tell that they are involved in more incidents than the general cycling populous. The footage could be taken over a long period,they may well cycle many miles and cycle on more hostile routes - hence the desire to film.
Is Gareth the person who does 'silly cyclists' on Youtube? The main thing I don't like about that is the way he shouts at other cyclists for doing things he feels are unsafe.
My wife and I have a similar amount of cycling experience over many years, but quite different styles. She is far less likely to take primary, rides in the door zone,often moaning at me for getting in everyone's way and inconveniencing drivers. She feels much safer that way and has never been in an accident . I however was doored a couple of years ago by someone who overtook me and then had their passenger open their door! I guess however one rides, we need to be alert for the unexpected.
It is difficult to be sure about Gareth's riding without having ridden the road oneself, so I would trust what he says and assume he has taken the correct line - it is more than likely what I would have done (ie ride about 3 feet from middle line). Otherwise what I find happens is that cars pass you too closely at speed, pressuring you to move even further left, until you're 18" from the barrier on your left being blown around by a lorry overtaking too close, too fast and making you wish you'd 'inconvenienced' them for a few seconds. It always amuses me that car drivers never seem to be concerned when bikes are stuck behind them!