A well done clip from the US PBS series on First Civilizations presents seals as tools of trade and among the world's first branding vehicles. Stunning seal close-ups, erudite narration, and a thought-provoking point-of-view further explored in Rajesh Rao's recent The Indus Script and Economics. A Role for Indus Seals and Tablets in Rationing and Administration of Labor.
If the clip above does not play in your region, it is also available on the PBS website at https://www.pbs.org/video/merchants-seal-nsqo7q/