North Shore Rescue crews have posted three videos captured by a helicopter flying over Grouse Mountain in an effort to find missing British tourist Tom Billings.

Scroll down to watch two more videos released by North Shore Rescue crews in the search for Tom Billings. Reading on mobile? Click here to watch the videos on YouTube.

Billings, 22, went missing while visiting Vancouver at the end of November.

Photos and video of Grouse Mountain and Lynn Waters are being uploaded online to give the public a chance to review the pictures and let crews know if they notice anything that might help the search.

Billings had been on an eight-week tour of North America. He was last seen on Nov. 25 in the 1400 block of East Broadway.

He was reported missing when he failed to follow through with his planned travel itinerary in and around Vancouver and did not return to the UK as planned on Dec. 7.

This latest search and rescue effort is being funded by the Billings family.

North Shore Rescue spokesman Tim Jones said warmer weather is aiding the search.

"The gullies are clearing of snow so...(we can) come back to check those areas we couldn't check [before]," he said.

Jones said they are continuing to appeal to anyone who may have seen Billings hiking on the North Shore. They are also looking for the owner of a sleeping bag found at the Elsay Lake shelter.

"I don't think the closure is likely to be very pleasant, but all the time you don't have certainty, thoughts go round in your mind." - Martin Billings

Family seeks closure

It is thought Billings may have gone hiking on the North Shore, something he had previously discussed. It is also possible he may have been seen in North Vancouver at a coffee shop, although the sighting is not confirmed.

His father Martin Billings, who flew to Vancouver briefly earlier this month to appeal for the public's help in the search, spoke to CBC News via Skype on Boxing Day.

Tom Billings

Tom Billings is 5'7″ with blonde short hair and blue eyes. He was last seen wearing a black jacket and grey military-style pants. (Vancouver Police Department)

He said if his son was on the North Shore somewhere, the possibility of him being alive was very remote, but it may be that he never went to the North Shore at all.

"In this situation, you just feel the need to get some sort of closure. I don't think the closure is likely to be very pleasant, but all the time you don't have certainty, thoughts go round in your mind," Martin Billings said.

Martin said his family haven't marked the Christmas season much, but it has felt more poignant without his son there.

"That's going on for everybody else out there, but for us time seems to be standing still," he said.

"We'd love it if he knocked on the door in five minutes' time and said 'Oh hi Mum, hi Dad, I've just been doing something and here I am', but I don't think that's likely to happen."