Moscow has cast doubt over the relevance of the footage showing two Russian nationals visit the U.K., travel to Salisbury and leave during the attack.
The Russian government previously accused British intelligence officials of carrying out the Skripal poisoning as a way to stir up anti-Moscow sentiment.
Reports suggest the 44-year-old and her partner handled a contaminated item.
The man and woman who fell ill in Amesbury were exposed to the same nerve agent that hospitalized a former Russian agent and his daughter.
The suspected poisoning incident occurred a few miles away from where former Russian spy Sergei Skripal and his daughter were attacked with a nerve agent.
The attempted murder retrial opened with accusations of several extramarital affairs.