Nicola Urquhart was adamant that the footage was of her son, and claimed that the public would be "horrified" to see it as it went against theories being explored by the police into the RAF gunner's disappearance.
Corrie, of Dunfermline, Fife, was 23 when he vanished on a night out in Bury St Edmunds, Suffolk, on September 24 2016.
His last confirmed sighting was at 3.25am.
The BBC requested that the CCTV footage should be released to the public, however Suffolk Police refused.
Officers said that it could prejudice the £2.1m investigation.
Corrie was stationed at RAF Honington, around 10 miles from Bury St Edmunds.
His mum has previously clashed with cops about his disappearance, and is insistent that he is alive.
SEARCH FOR THE TRUTH: What we know about missing RAF gunner's last moments
The gunner, then 23, went missing on September 24, 2016, after a night out in Bury St Edmunds.
Corrie drove to the town for a night out wearing a pink Ralph Lauren shirt, white trousers and brown Timberland boots.
He separated from his friends, with CCTV footage showing him eating takeaway food at around 1.20am.
At 3.24am he was spotted taking a nap in a nearby doorway before leaving the view of the camera.
This was the last confirmed sighting of Corrie.
Data from Corrie's phone showed it moved between Bury and Barton Mills on the morning of his disappearance.
This is on the route of the lorry that collected rubbish from the bins where Corrie was last seen.
Detectives believe he could have been crushed by a bin lorry after falling asleep in one.
Cops revealed Corrie was "known to sleep in bins".
"I will continue to do all I can to make sure it is searched and my son is found," she said previously.
"I will not give up, neither will Corrie's brothers or our family."
Corrie's father, Martin McKeague, previously shared a statement from Suffolk Police saying a Biffa bin picked up on the day Corrie went missing, in the area where he was last seen, weighed 256lb – much heavier than usual.
He said he accepted his son is "gone" but Ms Urquhart questioned data about the bin weight.
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