From the Associated Press, which still considers the footage "unverified":
Near the end of the video, they stop dancing and break into their version of an oft-heard battle chant in the Middle East: "With our souls, our blood, we sacrifice for you Bashar!" as black smoke billows from a building in the background. In a jarring finale, they shoot bursts of automatic gunfire in the air.
The video, which was allegedly filmed in southern Syria, appeared to be authentic and the uniforms consistent with those worn by Syrian soldiers. It appeared on both pro-regime social networking sites and anti-regime YouTube channels, as is normal for such material.