Noted on the film list that Scottish Highlands enjoyed a (very brief) public video release - it was included in Along Nostalgic Lines Vol. 3 (produced by John Cocking Video / Salford Films).
Along Nostagic Lines are the rarest of all public video releases of BTF films. Five volumes were produced some time in the early 1990s but they were quickly withdrawn from sale with copyright / royalty issues with the British Railways Board suggested as the likely reason. The quality of the videos was poor due to the well worn and often faded film prints used and cheaply photocopied insert sleeves.