Complex sentence: It was seen in 65 countries by half a billion people, and has almost continuously remained on the charts since its release and is the second best-selling music video of all time, selling more than 7 million copies worldwide.
Split into simpler sentences: It was seen in 65 countries by half a billion people, and has almost continuously remained on the charts since its release. It is also the second best-selling music video of all time, selling more than 7 million copies worldwide.