Reporter Steve Marshall swiftly approaches Tjin before saying: "I've heard of snakes on a plane but I haven't heard of a snake on a train."
Tjin looked awkward and said "it was wrong". Asked if he admits what he has done, he said: "Yeah, I do."
Snake on a train: This is the extraordinary moment a commuter creep 'admits it was wrong to film people from the window of a train'. Photo / ACA
Tjin was arrested and charged with 13 counts of filming private parts without consent.
Two of the charges related to girls under the age of 16.
The 33-year-old is on bail and due to face court in June.
Filming private parts, or "upskirting", is punishable by up to five years in jail when it involves victims younger than 16.