Unfortunately, I think liability Insurance and Health and Safety must take a degree of blame for customers NOT being allowed in the 'workshop'. My Jazz was bought with a 2 yr service pack and whilst it was very nice to sit in a posh show room with limitless free coffee/tea etc I too would sooner be allowed to see underneath. This I can do at our local garage, where the Jazz will be going from now on. Not only will it save a 60 mile round trip, the bill will be considerably lighter. £150 plus for oil /filter change MOT and a car wash the rest allegedly done!!!!!. I can oil my door locks which wasn't done last time!!!!and look around the car and look through the wheels to see the state of the brakes. If I don't know when my tyres want replacing it could be that I should give up driving. Sorry all I want is to be sure the important bits are done properly.
One point re the Main Dealer was that they did have viewing windows to see into the workshop.
In my days in the garage, we encouraged the customer to see what we were doing BUT how things have changed.
An observation re the video, surely it depends on the camera operator where he/she points it and it can't get behind certain parts, say the transmission drive shafts OR do they video as they work?
?. I cannot see the point of it.