SD or HD Master: £250 per consecutive 60-second clip — royalty-free (editorial).
From Soviet Nuclear Test Stock Footage — Semipalatinsk RDS-1 (1949), part of the TVDATA archive. The clip is available to license; packages are on the pricing page, and a restored 4K version can be prepared on request (4K archival footage). Email footage@tvdata.tv with the clip and duration you need.