They were still streaming live right after the building blew up... it doesn't take much equipment to do it nowadays... here for example: https://www.youtube.com/watch?v=-upyPouRrB8
They don’t mean because of material damage, it is due to the clear signal sent that Israel is willing to use military action against the media. obviously this is going to reduce the coverage as not all journalists are willing to risk their lives to cover a story.