That's the claim, but which one is her son and is her alleged son clearly identifiable in the video or the stills? It is very blurry and the faces are mostly obscured. Has anyone seen good photographs of her son and is any still clear enough to prove an exact match. Where was his body dug up and where is the autopsy report?
Serbs are saying this woman is being shown on TV holding photographs of her son in uniform - meaning he was a soldier. She also had another son who was wounded there, but evacuated to a hospital in Tuzla. So, it sounds like her other was injured fighting - they don't say who evacuated him nor how he was transported. After a short stay in the hospital (it had to be short because the war, which was almost over after Srebrenica, was still going on) he was later killed by shelling after he got out.
Just because she claims one of the men is her son there doesn't prove it. Did you see photos of her son and recognize that it is him from the video?