abdalaziz alhamza wants the world to know what's happening there. his aim is to combat is propoganda. it puts him in danger. >> i don't care about my life anymore. i lost a lot of relatives, a lot of friends, lot of colleagues. i am afraid only for 5 to 10 minutes everyday when i get up. because in the morning i check my mobile phone. i am afraid if anyone of my friends will be killed. reporter: the city of raqqa is at the heart of is-controlled territory. the footage comes from his contacts there. abdalaziz alhamza lives in hiding in berlin. he posts the footage on facebook and twitter. he helped found a group called "raqqa is being slaughtered silently." it's made up of 27 activists who report on the horrors that take place there. >> isis claimed that they are real islam. and they show the islam in a photo. so for me it was a duty for my city first and second to me as a muslem to show that they are not real islam. reporter: he hopes this kind of documentation will make young people question isis propoganda. >> anyone who is thinking to join or to