Isaiah was heart broken when King Uzziah died. The Lord knew he needed a vision of heaven. He was sent out to the people with messages that were not popular.
Several minutes at the end is music by Keith Green. The Lord wooed Keith away from drugs and a wild life. Then all Keith's musical talent was for Him. The Christian community grieved when he and others died in a small plane crash. Thankfully, many of Keith's songs were left behind to witness and enjoy.