He warned that the use of violence by the army will only put the lives of the hostages at further risk, since the militants are "ready to die for their religion."
Speaking directly to Duterte, he stressed that "you can't use force and violence because they have the commitment they will die for this."
"Please consider us, we are victims," he said, explaining that if needed, he would beg for their release and for the army to withdraw.
The video, according to CBCP News, first surfaced on the Facebook account of a user named "Datumasa Khalid." Although it's still unclear where the video was filmed, Fr. Suganob is seen standing in front of houses and vehicles that have been destroyed.
According to Philippines station ABS-DBN News, the death toll from fighting in Marawi has risen to 104, including some 65 militants, 20 government forces, and 19 civilians.
Much of the city's population of more than 200,000 has fled the city, though officials believe as many as 2,000 have been trapped by the fighting.
In response, the area's Caritas branch on May 29 launched a solidarity appeal asking dioceses to contribute what they can to help the displaced. As a start, the charitable organization has offered an initial 300,000 Philippine pesos ($6,000) for relief efforts in nearby Diocese of Iligan.
In the wake of the kidnapping, the Filipino bishops have urged prayers for Fr. Suganob and the other hostages.
While the majority of Filipinos are Catholic, they make up only five percent of the population in Marawi, a mostly Muslim city.
Archbishop Socrates Buenaventura Villegas of Lingayen-Dagupan, president of the Filipino bishops' conference, last week urged prayers for peace and asked the militants to show mercy.
"We call on the Maute group that claims to bear arms in the name of a Merciful and Benevolent God – the very same God we Christians worship and adore – to do the One God true honor by the mercy and benevolence that are two of our God's most exalted attributes," he said May 24.
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The archbishop also addressed the response of government forces, saying, "We beg of them to make the safety of the hostages a primordial consideration."
Duterte, who has been heavily criticized for a brutal crackdown on illegal drugs, has placed all of Mindanao under martial law.
The president has sought peace talks with two large Muslim rebel groups in the country's south but has ordered the military to destroy smaller extremist groups like the Maute.