Most photographs and the moving picture on the first screen are from Pexels and are used under the Pexels licence.
From Wikimedia Commons
London hallmarks on a Paul Storr tray: photograph by Rauantiques, CC BY-SA 4.0, from Wikimedia Commons.
Birmingham silver spoon, 1899: photograph by Jojorei, CC BY-SA 2.0, from Wikimedia Commons.
Three Walking Liberty half dollars: photograph by BrayLockBoy, CC BY-SA 4.0, from Wikimedia Commons.
Street lamps of the Diamond District, West 47th Street: photograph by Colin W, CC BY-SA 3.0, from Wikimedia Commons.
Marks on a Fabergé fork: photograph by Charles J. Sharp, CC BY-SA 4.0, from Wikimedia Commons.
Tiffany & Co. Chrysanthemum teapot, coffeepot and bowl, 1891 to 1902: photographs by Cooper Hewitt, Smithsonian Design Museum, public domain, from Wikimedia Commons.
The Commons photographs are shown cropped and resized; the plain grey backdrop of the Tiffany & Co. photographs is extended at the sides to fit the page.