There was Vietnam War film that featured the Australian SAS. This showed them mainly in camp but deployed on a regimental basis.
It particularly pointed up the difference between well trained professional soldiers trained in jungle warfare and conscripts. It had nice touches such as the now obsolete can opener hanging from the tent roof or the rubber band around the ubiquitous zippo lighter to stop it falling out of your pocket.
Before I am rhubarbed, remember this film was about 35 years ago.
The other special forces film was made by the MOD Film Unit and called Top Mallo House - a short documentary style - that featured the special forces assault on an Argentine SF at TMH on FI.
Another MOD Film was Yesterday's Enemy, circa 1955, a jungle warfare film against the Japs. I think Richard Todd may have starred. It had all the trappings on the JW SAS series in ITV a couple of years back.