Separately, Indonesian suspect Siti Aisyah was seen meeting with another man also wearing a cap at an airport cafe just before the attack was carried out in a crowded departure terminal of the Kuala Lumpur airport on Feb. 13.
In the first recording she was shown approaching a bystander from behind to wipe something on the person's face "in a soft manner", according to police official Wan Azirul Nizam Che Wan Aziz.
Wan Azirul said the two men are among four people at large whom prosecutors accuse of having the common intention with the two women to murder Kim.
Wan Azirul named the two other at-large suspects as James, who is suspected of recruiting Siti Aisyah, and Hanamori, nicknamed Grandpa-Uncle, suspected of giving orders to Mr Y.
Videos presented in court showed Vietnamese suspect Doan Thi Huong walking in the airport with a man wearing a baseball cap.
Wan Azirul said he took possession of the victim's blazer, backpack and watch and handed them to the chemistry department for analysis, but was later told by investigation authorities to hand them over to representatives of the North Korean embassy.
"He is the individual who put liquid onto the hand of the second accused [Doan]". The court was told that Mr Chang had also smeared the oily substance on her hands.
Prosecutors contend the women knew they were handling poison, and scientists who testified earlier said VX could be removed safely by careful hand-washing. He said the names were provided by Doan and Siti Aisyah during the police interview.
Pyongyang conducted its fifth nuclear test on the anniversary of the founding day of North Korea last year. The police identified the four as Rhi Ji Hyon, Hong Song Hak, O Jong Gil, and Ri Jae Nam.
A chemist testified earlier he detected VX on Huong's fingernail clippings and that the amount of VX detected on Kim's face exceeded a fatal dose. But they were allowed to return to North Korea along with Kim's body on March 31, as part of a deal that ended a six-week diplomatic row between the two countries following Kim's assassination.
Their defense lawyers have said Huong and Aisyah were duped by suspected North Korean agents into believing they were playing a harmless prank for a TV show.
"She seemed to be anxious". The lawyer said James had Aisyah go to malls, hotels and airports and rub oil or pepper sauce on strangers which he would film on his phone, and paid Aisyah between $100 and $200 for each prank.