WATCH: Maute, Hapilon plan Marawi terror attack

Metro Manila (CNN Philippines, June 8) — Seize hostages. Loot. Release prisoners from jail. Take over schools. This was how the Maute group planned to sow terror in their siege of Marawi City.

Video footage recovered by the military in the days after the Maute first stormed Marawi City on May 23 captures the terrorists' intentions.

"'Pag nagsimula na ito...Free na tayo kahit ano gawin natin sa kanila (Once this starts, we can do whatever we want with the residents)," Abdullah Maute, one of the brothers leading the Maute terror group told at least 10 other men seen in the video, including his brother Omar and the elusive former Abu Sayyaf-Basilan leader Isnilon Hapilon.

"Puwede tayong mag-jail break. Puwede tayong mag-ghanimah. Puwede tayong pumasok sa mga paaralan. Puwede na manghostage (We can lead a jailbreak, steal, enter a school, take hostages)," Maute added.

The Armed Forces of the Philippines (AFP) on Thursday provided CNN Philippines a copy of the video upon request.

The long-haired, bearded man used a blue marker pen to plot target areas on a folder. The clearly readable targets are MSU (Mindanao State University), Marawi, and Butig. MSU is in Marawi City, which is the capital of the province of Lanao del Sur. Butig, a former training ground for Moro Islamic Liberation Fighters, was the base from which the Maute group operated and is 51 kms. south of Marawi City.

At least two other men were taking videos of the meeting, which was held in a concrete house whose location the military did not disclose.

They sought to establish a "wilayat," or caliphate in Lanao del Sur of extremist network ISIS, which has yet to officially acknowledge the Maute group. The Maute also refer to themselves as IS-Ranao.

The video is believed to have been recorded days before law enforcers attempted to serve Hapilon’s arrest warrant in Marawi on May 23. This led to clashes between government forces and the terror group which prompted President Rodrigo Duterte to declare martial law in Mindanao also that day.

Related: Marawi crisis timeline

AFP Spokesman Brig. Gen. Restituto Padilla said however, that the video was not the basis for Duterte's Proclamation No. 216, declaring military rule in Mindanao, since the President only saw the footage after his verbal announcement.

Senator Panfilo Lacson on Wednesday said that the video, which was shown to senators in an executive session by top military officials a few days after the siege started gave him the justification to support the declaration of military rule in Mindanao.

“I think I can now disclose that this video footage, among other disclosures in the security briefing made by top security officials of the Duterte administration during our executive caucus, is what made me decide to vote in favor of the martial law proclamation in Mindanao,” Lacson told reporters.

The declassification of the video also comes as seven lawmakers in the House of Representatives critical of martial law filed a petition with the Supreme Court questioning the constitutionality of President Duterte’s proclamation. The high court on Tuesday said it will hear arguments for and against the petition beginning June 13.

Spreading terror

Authorities discovered the video during the series of offensives in Marawi in an attempt to flush out the Maute group fighters, Padilla said.

The video, along with documents recovered in the battleground are "proof that there was indeed planning that was going on to destroy and wreak havoc and spread terror in the city of Marawi," Padilla earlier said.

“They wanted to seal off and block off certain approaches to the city. So once they are able to successfully do that, no one can get out. No one can come in. And they can control all these points like what they attempted to do during the initial days of the fighting when they held on to bridges and certain avenues," Padilla said.

"Thank God we have been able to prevent that from happening on a bigger scale and we are working to liberate Marawi quicker as the days go on," he added.

The military said 134 terrorists, 39 government troops and 20 civilians were killed in clashes in Marawi as of Wednesday, 16 days since the siege started. A total of 1,545 civilians were rescued. More than 100,000 Marawi City residents have fled north to Iligan City and other parts of Lanao del Sur to escape the fighting.

Hapilon and the Mautes

Hapilon, who wore a yellow and black head scarf, was listening as Abdullah Maute relayed plans in the two-minute video.

It confirms that Hapilon, who was earlier said to be wounded in a clash in Basilan with government forces and fled to Marawi, is collaborating with the Maute group.  ISIS leadership in Syria however is said to have designated Hapilon as its “emir” in Southeast Asia in 2016

Hapilon is also on U.S. list of most-wanted terrorists, with a P5-million bounty on his head.

Duterte recently offered another P10-million reward for his arrest, and placed P5 million each on the heads of the Maute brothers.

Related: What is the Maute Group?

CNN Philippines' Ina Andolong contributed to this report.