Complex sentence: He quit on August 6th, 1985, as stated in one of his YouTube videos called "edarem-How I Quit Smoking", but unfortunately died from fast-spreading lung cancer on January 8th, 2012.
Split into simpler sentences: He quit on August 6th, 1985, as stated in one of his YouTube videos called "edarem-How I Quit Smoking". Unfortunately however, he died from fast-spreading lung cancer on January 8th, 2012.