ITV News Correspondent Stacey Foster explains the sequence of events in the footage
Police investigating the disappearance of university student Libby Squire have been given more time to question a 24-year-old man arrested on suspicion of her abduction.
A statement released by Humberside Police revealed a court granted officers a "further 24 hours to question the man".
Detective Superintendent Mathew Hutchinson added: "We are still treating Libby's disappearance as a missing person's enquiry. I have said previously that we are keeping an open mind as to her whereabouts and that is still very much the case.
"Our number one priority is to find Libby Squire and we are still conducting extensive searches and appealing for any information from the public."
It came after CCTV footage, thought to be a central part of the investigation into the disappearance of university student Libby Squire, was obtained exclusively by ITV News.
The grainy video was filmed from a camera close to the location in Hull where Libby is thought to have disappeared in the early hours of Friday last week.
It is now being examined by detectives for potential clues in the investigation, which has seen a 24-year-old man arrested.
Video report by ITV News Correspondent Stacey Foster
He was held on suspicion of abduction on Wednesday night at an address in Raglan Street in Hull, which was being searched by crime scene investigators on Thursday.
Police said the man is helping them with their enquiries and said finding the Hull University student remains their "top priority".
It is thought 21-year-old Libby was near a bench at a junction on Haworth Street, close to her home, for about 30 minutes after a night out on Thursday, with a motorist stopping to offer her help at one point. She was last seen at 00:09 on Friday.
What does the CCTV footage show?
(Real time: 00:01:02) The CCTV ticks over, a minute slow
The CCTV is timed just seconds after midnight on February 1, although ITV News understands the clock is a minute slow.
(Real time: 00:03:08) The car outside is apparently unlocked
Even though a cobweb partially covers the camera, the yard's gates and cars parked in the street outside are clearly visible.
At around 00:02:08 on the clock two bright flashes of light are seen, indicating a car being unlocked.
(Real time: 00:03:18) A man appears
Three seconds later there are four more flashes as the car's locks are apparently activated again.
A few seconds after that a man is seen for the first time, as he walks into view.
(Real time: 00:03:29) The man sits but his face is obscured
He opens a door and sits in the driver's seat facing out, but his face is not easily seen.
His hands are close together, appearing to be rolling a cigarette.
(Real time: 00:03:37) A cyclist rides past
As he does, at just after two minutes past midnight, a cyclist goes past.
The rider could be a vital witness.
(Real time: 00:06:06) A vehicle also passes
Within a few minutes, as the man appears to smoke, another car drives past the spot.
Again, the driver may provide information that could aid the investigation.
(Real time: 00:06:19) The man locks the car and walks away
After sitting for exactly two minutes and 52 seconds, the man outside the garage stands up.
He walks away and the car's lights flash again as the vehicle is apparently locked.
(Real time: 00:07:58) It appears someone, or something, is placed inside the car
One minute and 42 seconds later, after more flashes, a person is seen on the opposite side of the car and opens the front passenger door.
It's difficult to see what happens, but it appears someone or something is put inside the vehicle.
(Real time: 00:08:52) The car is driven away
Seconds later the man re-appears on the visible side of the car and gets into the driver's seat.
He puts the headlights on and reverses before driving off just before nine minutes past midnight.
Humberside Police's Detective Superintendent Matt Hutchinson told ITV News: "There have been 100s of hours of CCTV footage viewed as part of our investigation into the disappearance of Libby Squire.
"There are various lines of enquiry we have investigated and are following up in connection to CCTV footage.
"While we currently have a man in custody and proceedings are active, we are unable to provide any further comment in regards to the nature of any footage so not to prejudice any potential further proceedings.
"Our priority remains to find Libby and support her family during this incredibly distressing time. We continue to keep an open mind and would ask anyone who believes they have information that could assist with the investigation to please make contact with police."