Al-Qaeda’s No. 2 commander appeared on Wednesday in a new video on a Web site used by Islamist militant groups, urging unity in jihad and calling for the overthrow of “corrupt” Muslim governments in the region.

The English version of the title posted on the site was ”The Advice of One Concerned” and the video showed the Egyptian cleric Ayman al-Zawahri wearing a white robe, speaking in Arabic with English sub-titles.