Hamas released a video of Israeli-American hostage Hersh Goldberg-Polin on Wednesday, the first proof that he survived being badly wounded during his capture on Oct. 7.Goldberg-Polin, then 23, was kidnapped from the Nova music festival during Hamas’ attacks on Israel when more than 1,200 people died and more than 200 people were taken hostage.He is shown in the undated video with part of his left arm missing several inches above the hand.Related video above: Parents of kidnapped American-Israeli hostage make emotional plea for the release of their son.Video filmed on Oct. 7 showed Goldberg-Polin being taken hostage with his arm severely injured. A firsthand account from a young woman, who was in a bunker with him when Hamas attacked, said he had helped to throw grenades out, before his arm was blown off from the elbow down.The latest video shows Goldberg-Polin sitting in a chair, addressing the camera. Gesturing occasionally …