Suggests that subtitle tracks are included with the file (likely English for the hearing impaired).
The show focuses on the local Home Guard—a voluntary defense organization of men ineligible for military service (due to age or reserved occupations). They are led by the pompous bank manager, George Mainwaring. 2178-BR1080p-SUBS-DADSARMY.mp4
Indicates a Blu-Ray rip in 1080p resolution (Full HD). This signifies high-quality video, likely superior to television broadcast or DVD versions. Suggests that subtitle tracks are included with the