Police say 20-year-old wanted to "kill as many people as he could."
The convoy included foreign fighters and militants who made their way to other areas of Syria and Turkey.
The three-minute chant was played for as long as 30 minutes.
Russia said it killed the top militant in May but the Lebanese group has challenged the claim.
In 2015, the French far-right leader tweeted "Daesh is THIS!"—using an Arabic acronym for ISIS—along with photos.
Media reports indicated that jihadis had mentioned the young royal's school as a target.
The guards are to be trained to spot suspicious behavior by potential attackers.
The video shows armed militants in the vicinity of the attack on October 4.
ISIS has aspirations for a larger presence in Africa, where it has already established several affiliates.
Russia has long warned of the threat of returning foreign fighters. New figures show why.
ISIS recruits should expect to be assassinated because of the threat they pose, British minister says.
The U.K. is experiencing some of its highest crime rates in decades.
"They want to take down aircraft, the intelligence is clear on that," she said.
Saja Al-Dulaimi says she stopped talking to the world's most-wanted man in 2009.
Trump "has done more to isolate North Korea & defeat ISIS in 8 months than Obama did in 8 years," the president's press secretary tweeted.
Iraq has separated female foreign fighters and detained them at a facility near Mosul.
Ahead of Congress vote, Senator Rand Paul says the U.S. government wants "unlimited war" without a legal basis.
Russia and the U.S. continue to trade claims about the most wanted militant in the world.
Middle East Christians have never taken up arms against America anywhere in the region.
The former diplomat says the U.S. must rail against Iranian domination in the Middle East.
An ISIS suspect recounts murders and rape in court testimony.
Iraqi forces are preparing an offensive on ISIS-held Tal Afar, where the group has some 2,000 fighters.