"40's imagery" is certainly what it is! I recognised many (if not all) of the scenes as being from the 1942 film, 'The First of the Few', with Leslie Howard playing designer and engineer Reginald Mitchell, and David Niven as a character named Geoffrey Crisp, which some believe to be based on Jeffrey Quill, a test pilot at Vickers.
To it's credit, at the end of the video the movie is acknowledged!