Branson uploaded the video and images to social media on Monday morning (AEST), with buildings and vegetation on Necker Island significantly impacted by the historic weather event.
The video shows the former luxury resort has been reduced to hollowed-out buildings, smashed interiors and collapsed trees.
"As you can see from the photos, much of the buildings and vegetation on Necker has been destroyed or badly damaged," he wrote online.
"We felt the full force of the strongest hurricane ever in the Atlantic Ocean.
"But we are very fortunate to have a strong cellar built into Necker’s Great House and were very lucky all of our teams who stayed on Island during the storm are safe and well."
The Englishman was posting from Puerto Rico as communications are reportedly not operating on the British Virgin Islands, where Necker is located.
"This story is about the tens of thousands of people who have lost their homes and their livelihoods," he wrote.
Branson said the government's response to the Hurricane - which has been highly criticised - has led to "worrying reports of civil unrest".
"We must get more help to the islands to rebuild homes and infrastructure and restore power, clean water and food supplies," he added.
He urged those who were able to donate to the British Red Cross appeal via Virgin Money Giving.
From the British Virgin Islands to Cuba, Caribbean islanders have begun counting the cost of Hurricane Irma after the brutal storm left a trail of death, destruction and chaos that could take the tourist-dependent region years to recover from.
The Category 5 storm, which killed at least 28 people across the region, devastated housing, power supplies and communications, leaving some small islands almost cut off from the world. European nations sent military reinforcements to keep order amid looting while the damage was expected to total billions of dollars.
Ex-pat billionaires and poor islanders alike were forced to take cover as Irma tore roofs off buildings, flipped cars and killed livestock, raging from the Leeward Islands across Puerto Rico and Hispaniola then into Cuba before turning on Florida.
Waves of up to 11 metres smashed businesses along the Cuban capital Havana’s sea-side drive on Sunday morning. Further east, high winds whipped Varadero, the island’s most important tourist resort.
By Monday four people were confirmed dead as a result of the hurricane bringing rising seas, floods and 210 kilometres per hour winds. Power cuts have affected nearly two million people.
- With Reuters
