I expect that the Shell film of the 1958 Alpine Rally (Coupe des Alpes) has been previously mentioned somewhere on TNF. The film is on YouTube. What may not be generally known is that Denis Jenkinson drove one of the camera cars, a Giulietta Spyder, for the film. We see him at one stage warning competitors of a crashed car round the next hairpin and several probably showing his hands on an Alfa steering wheel.
He wrote at length about the experience in Motor Sport September 1958. As descriptive writing about a motoring event it rivals his Mille Miglia stories. You may ask whether it’s better to see the film or read the article first but it’s irrelevant because, like me, you will probably want to do both several times.