How Long Will I Love You was originally sang by the band The Waterboys in 1990. It was subsequently revived through a ballad rendition by Ellie Goulding on November 2013. The video below was derived from a short film by Roger Michell (director of Notting Hill) starring Ellie herself entitled Tom & Sissy.
If you want to hear the original version of the song by The Waterboys, (uploaded by ELRAULDELOSRECUERDOS) play it below.
And if you want to see the short film Tom & Sissy , click here.