I'm not aware of any dealers who video the whole service. It sounds a bit impractical.

I am however, impressed by the local Mercedes dealer I use, who email me an attachment of the "visual health check", which is a 3 to 4 minute film of the technician going around underneath the car showing the condition of pads and discs, tyres, exhaust, suspension and steering components etc.

Mind you, for £120 per hour, or whatever it is........

They also have large windows from the coffee area into the workshop.

If you don't trust a garage to perform a service properly, change the garage.

I also use an excellent independent Mercedes specialist, who talks you through exactly what has been done, showing you the parts he has replaced and why, before telling you what should be done at or before the next service. £50 per hour.

Local Hyundai dealer has a viewing window from the comfortable waiting area. Also a free coffeee machine, WiFi and newspapers/Autoexpress magazines.

Prices pretty reasonable too.