CNN has obtained a video of some of the "Chibok Girls" sent to negotiators by their captors as a "proof of life." "My Saratu," she wails, before breaking down in sobs. Some 20,000 children in the town and its surroundings have no school to attend, he said Thursday as parents started gathering at the school to pray for the safe return of their daughters. The extremists seized 276 girls who had gathered for science exams at the Government Girls Secondary School in the northeast town of Chibok. "I am speaking on 25 December 2015, on behalf of the all the Chibok girls and we are all well," she says, stressing the word "all." Yakubu Nkeki, leader of a support group of parents of the kidnapped girls, said he briefly saw part of the CNN video, in between power blackouts frequent in Nigeria, and recognized some of the girls. There's been no word of the girls since April 2014, when Boko Haram leader Abubakar Shekau said they had converted to Islam and threatened to sell them into slavery or forced marriage with his fighters. Lai Mohammed, the country's Minister of Information, said there were concerns that the girls did not appear to have changed sufficiently, that they are not as different as one might expect, given the two years that have elapsed since their disappearance. JUST WATCHED Nigeria Senator: Chibok video obtained by CNN is credible Replay More Videos ... MUST WATCH Nigeria Senator: Chibok video obtained by CNN is credible 07:25 
 
 CNN spoke to a classmate of the girls seen in the footage, who confirmed the identity of several of her friends. CNN on Wednesday aired the video, believed made in December, of girls wearing the Islamic hijab, and of one mother reaching out to a computer screen as she recognizes her daughter. Photos: In photos: Life after Boko Haram Photos: In photos: Life after Boko Haram 
 
 
 
 "The Boko Haram insurgency has left a toll on our community, and the impact has been physical, psychological and economic," she explains. They burned all of my property, my animals and killed my two sons. Two mothers and 16 fathers have died since the mass abduction, some of them victims of Boko Haram attacks. The video ends with one of the girls appealing to Nigeria's government to meet unspecified promises. They say they don't want us to have Western education and our children don't," Nkeki said. While Boko Haram is thought to have abducted thousands of people over the years, the mass abduction brought the extremist group to the world's attention. "We are all well," one of the girls says in the video, emphasizing the "all." "I didn't see my daughter but I now have more hope that she is alive," she tells us and her friends. I want the world to raise their voice.
– Thursday marks an awful anniversary for families of the nearly 300 girls kidnapped from their school in Nigeria: It's been exactly two years since Boko Haram staged the mass abduction in Chibok. Now, a video has emerged that appears to show some of the girls, a "proof of life" video apparently taken for use in negotiations, reports CNN, which obtained it. The clip shows 15 of the girls stating their names, and one says that "all" the girls are well. Families and friends confirm it's legit. "The moment I saw them and recognized their faces—Saratu Ayuba, Jummai Mutah, and Kwazigu Hamman—I started crying, with tears of joy rolling down from my eyes, thanking God for their lives," one girl who managed to escape tells the AP. However, it's not clear when the video was shot. One of the girls in it states that she is speaking in December 2015, but the Nigerian government says it may have been taken soon after the kidnapping and thus means little. "As long as we have not closed our search for the girls, of course we’ll keep talking," a government official tells the New York Times. But "most of these claims, they turn out not to be true." The militant group kidnapped 276 girls, but about 50 managed to escape fairly quickly. The rest have not been seen since. "My Saratu!" one mother says of her now 17-year-old daughter, upon seeing her in the video. "If I could, I would have removed her from the screen."