This track is called “Represent” and it is Weezer’s unofficial theme song for the US World Cup soccer team.
Weezer is an American alternative rock band that formed in Los Angeles in 1992. The band now consists of Rivers Cuomo (lead vocals, guitar), Patrick Wilson (drums, guitar, backing vocals), Brian Bell (guitar, backing vocals, keyboards), and Scott Shriner (bass, backing vocals, keyboards).
The clip mostly highlights the United States Soccer team when they are on the game and the supporters who are cheering from the side of the field.
A glimpse of Rivers Cuomo when he crafts the track in studio and performs with the band are also included.