Complex sentence: All episodes of the "Match Game-Hollywood Squares Hour" are believed to be intact; however, aside from a few bootleg clips on YouTube and other video sharing websites, they have not seen the light of day since the original airing.
Split into simpler sentences: All episodes of the "Match Game-Hollywood Squares Hour" are believed to be intact. However, aside from a few bootleg clips on YouTube and other video sharing websites, episodes have not been since their original airing.