Towers of the North: The Brochs of Iron Age Scotland (3000 BC - 200 AD)

From a channel Lumen includes in full: History Time is Pete Kelly's long-form documentary series on ancient, prehistoric and medieval history, especially Britain, Ireland and the Near East, narrated from archaeological findings and historical sources.

A 30-minute video from History Time's catalogue; the title names its topic.

Video by History Time, played through YouTube's embedded player.