Complex sentence: Two versions of the music video exists: the first was released in August 1994, later because of the huge success in the UK, Céline Dion made a special music video in December 1994 aired in the UK Top of the Pops television programme.
Split into simpler sentences: Two versions of the music video exists: the first was released in August 1994, later because of the huge success in the UK, Céline Dion made a special music video in December 1994. It aired in the UK Top of the Pops television programme.