The flames of war as rebels set fire to a government tank in a suburb of Damascus.
The video, which can not be independently verified by Reuters, comes as Russia says talks aimed at ending the conflict are unlikely before October.
They take aim at a building used by forces loyal to President Bashar al-Assad.
Russian and U.S. officials may agree on the need for peace talks but no one is offering concrete plans to bring the warring sides to the table.
Battlefield gains by Assad have added to questions about whether those talks will take place.
The conflict began more than two years ago, before descending into a civil war that has killed more than 100,000 people.