Can we believe Israel? They say they have been watching this specific Syrian pilot for years.
Special Middle East report on the chemical attacks in Syria
https://www.youtube.com/watch?v=AsBchlbdJdc
CNN Syrian Gas Attack Survivor Interview (Must watch!)
http://www.freerepublic.com/focus/f-news/3542325/posts
I have watched the Youtube clip you linked to. It is not Israel, it is an Israeli commentator. He may be right, He may be wrong, but he is no official Israeli source.