I have a few Highland Dress catalogues from that very period, a time when a range of new Evening jackets were coming in to style (the Prince Charlie, the Montrose, the Kenmore).

These four gents (in the dog scene) are all wearing styles which at that time were long-established, styles which had been worn since the mid-19th century, the Doublet (as it was then called, what we now call the Regulation Doublet, though it's hard to imagine what regulation is involved) and the Argyll.

At 36:30 you can clearly see the man in Outdoor Dress with a lovely tweed Argyll, and an 18th century style deerskin sporran.

Thanks for the link! It's wonderful to jump from the pages of my old dusty catalogues to seeing the stuff being actually worn.