This video is a compilation of brief snippets of video footage of celebrating Palestinians that was broadcast in the US media on September 11, 2001. Much more footage has been suppressed by the AP, as explained in this article.
The following information has been summarized from this Gateway Pundit article:
The AP has been shown to have suppressed video taken by a freelance AP reporter showing widespread jubilant celebrations by thousands of Palestinians in the West Bank on September 11, 2001, cheering the al Qaeda attacks that occurred in the United States on that day.
A 2015 New York Post article by former U.S. Attorney Harry Litman explains how the video was suppressed by the AP after the cameraman and news organization were threatened by Palestinian terrorists. Brief videos of smaller celebrations by Palestinians did get broadcast in the US media on 9/11 and have been compiled in the video that is posted on the top of this article.
Footage that is still suppressed supposedly shows thousands of jubilant Palestinians taking to the streets, chanting “Allah akbar,” firing automatic weapons and handing out candy to passers-by, with the largest demonstration taking place in Nablus in the West Bank where as many as 3,000 people danced and cheered.
Foreign journalists were in the area but they were forcibly detained in a hotel by Palestinian security forces to prevent them from documenting the rally, however one cameraman who was a freelance AP reporter managed to film some of the celebrations.
The next day, members of Tanzim, the military arm of Fatah, threatened the cameraman with death if the AP aired the material he recorded, telling them they could not “guarantee his life” if he did so.
The AP bureau chief in Jerusalem acknowledged the intimidation and refused to release of the footage citing safety reasons. The footage remains inaccessible to this day.
Litman laments, “… whatever exigency it could point to in 2001 cannot justify a permanent gap in the documentary account of the worst domestic attack in US history. These searing images belong in the public record, not in the closed video vault of a cowed news agency.”