Bali volcano Mount Agung has been showing signs that it is set to erupt for more than a fortnight.
In the video, latest footage of the volcano is shown as fears grow over when Mount Agung will erupt.
Residents in Bali have been warned to stay away from the volcano and its danger zones.
The volcano alert has been at the highest level, category four, since September 22.
Over 140,000 people were evacuated from the exclusion zone surrounding Mount Agung.
Half have been ordered to return, though the volcano’s seismic activity remains high.
Indonesia has extended the state of emergency in Bali to October 16, but no flights have yet been disrupted in anticipation of the natural disaster.
Dr Janine Kripper, a volcanologist monitoring Agung, translated a report by the Indonesian National Board for Disaster Management.
She said: “If anyone is injured on Agung – search and rescue teams will have to risk their own lives to retrieve them.
“The crack, the crater and steam being produced shows us all the rise of magma shows towards the surface.”
Britons in Bali have been urged to listen to the advice of the local authorities and stay out of the volcano’s exclusion zone.
The UK Government’s travel advice website said: “If there is an eruption, volcanic ash clouds could result in airport closures and flight disruption in the region.
“In the event of volcanic ash clouds, you should confirm your travel arrangements directly with your airline or travel agent before travelling to the airport.”