The video clip it's so simple, the camera follows the main singer while he is performing on the streets, the people look at him with surprise, some brave persons even joins at him. The "hook" is probably the ornate that he is taking with him, his music equipment at his back or the flowers on the guitar. It has some joining points too, like when the main part of the song is playing the whole band is together or when the background music starts some Tvs are playing their own music.
Coldplay has done a great job on this video clip. It makes you feel happy, so positive and energetic.
