http://www.csmonitor.com/World/Middl...hting-in-Syria

BEIRUT, LEBANON
An unprecedented and slickly-produced video is being circulated around Shiite areas of Lebanon showing alleged Shiite combatants fighting in Syria. The video's production and open dissemination highlight how fighters outside Syria are jumping into the country's ongoing civil war – and growing more bold about it.

According to Lebanese sources close to the militant Shiite Hezbollah, the combatants seen in the video are a mix of Hezbollah members and Iraqi Shiites, but the video was produced in Iraq.

Hezbollah’s leadership has played down persistent reports that its fighters are helping defend the beleaguered regime of President Bashar al-Assad. But the video, which was clearly made with the consent of the combatants, appears to reflect the growing conviction within Shiite circles in Lebanon that the war in Syria is no longer one between an embattled autocratic regime and a grassroots opposition but a sectarian confrontation against the emerging and increasingly influential Salafi Jihadist groups that view Shiites as heretics and Hezbollah as an enemy.

“I don’t feel that Hezbollah is defending the regime. They are defending themselves because once the regime goes, they are next,” says Ali, a glazier and staunch Hezbollah supporter from southern Beirut.
More at the link. By the way, if anyone wants to learn about Hezbollah's history, tactics, organization, and preparations for the next conflict with the Israelis, this guy's book is very good.