MANILA - The video of Abu Sayyaf leader Isnilon Hapilon and the Maute brothers plotting the attack in Marawi City was part of the terrorists' documentation that they would send to ISIS, according to the military.

Armed Forces of the Philippines chief of staff Gen. Eduardo Año said the Maute group led by brothers Omarkhayam and Maddi wanted to show the ISIS that they can succeed in establishing a camp in the city south of the Philippines.

"It was part of their documentation for propaganda purposes and at the same time, as a proof to their comrade ISIS in the Middle East about what they are doing," he told ANC on Thursday.

"They wanted to time the attack of Marawi during the first day of Ramadan, just like [Abu Bakr] al-Baghdadi did in June 2014 when they occupied Mosul and Iraq," he added.

• WATCH: Abu Sayyaf leader Isnilon Hapilon plotting Marawi siege

Año said the Maute group has not yet submitted the video to ISIS because they wanted to send a compilation of videos once they finish their plan of occupying the whole of Marawi.

The AFP chief of staff said the terrorists originally planned to attack Marawi City on May 26 at the start of Ramadan, but had to move it to an earlier date due to the military's attempt to neutralize Hapilon.

The video was discovered in a mobile phone seized during a May 23 raid of a the terrorists' safehouse in the city, he said, adding that the owner of the house is included their arrest order.

The martial law administrator said they have 200 persons in their arrest order, including terrorists, civilians supporting the Maute group, and even some politicians starting from the barangay level.

He said the authorities are currently serving the arrest warrants.