There is a detailed account of this bar crossing in the Sept/Oct edition of Australian Multihull World. Unfortunately I can't find an electronic version to post here. So here is a quick summary.
The owner/skipper has done eight years cruising on this boat up and down the Australian East Coats including many bar crossings and voyages across Bass Strait. He has significant previous experience and a Coxswains ticket and had recently done a two day formal course on bar crossing. His two crew members are also very experienced in offshore conditions - one with fifty years.
Leading up to this crossing they had come from Sydney to the Gold Coast in a couple of days including two overnighters. There was a low building in the Tasman Sea providing an incentive for them to seek calmer water. On ariving at the Gold Coast seaway in late afternoon they looked at conditions and contacted the local Marine rescue organisation. It didn't look good and a decision was reached to travel 60nm further north to round Moreton Island and come back down the indise to reach their destination. However soon after, Marine Rescue advised conditions were moderating. So then a process of assessment started and continued throughout the night where they would observe the waves on the bar at close range every few hours and go back out to sea. Tide was an issue and it was decided not to attempt a crossing during dark even though the moon was reasonable. At 9.00am the next morning a large monslug motor cruiser attempted the crossing and made it. radio contact and observation showed they had made it but only just. The cat, after carefully observing wave sets for a long time made the crossing shown in the video. An evealuation afterwards concluded that experience and preparation as well as the suitability of the cat contributed to the success. Would they do it again in the same circumstances - yes.

Cheers
John Dowling