Complex sentence: In 2008 a freestyle video of the group dancing was uploaded by a friend on YouTube without their knowledge which went viral within a matter of days and many people were claiming to be the dancers of the video as the video was not credited to them.
Split into simpler sentences: In 2008 a freestyle video of the group dancing was uploaded by a friend on YouTube without their knowledge which went viral within a matter of days. People were claiming to be the dancers of the video as the video was not credited to them.