This refers to a boy band because the way they are sitting together that is always included in boy band videos. This is similar to JLS “beat again” music video.

Dancing together in an area relate to the JLS video, also wearing white t-shirts

They lighting makes the boys look harmless and very emotional.

Together in a group, showing it’s a boy band

Using hand gestures to show there feelings while singing

Boy bands are usually very emotional, they are using face expressions and actions to show how they feel when they sing

You can see it’s a boy band by their dancing in a group

Without shirt, showing his chest tells us it’s a boy band as they usually show off their body

Sitting together, all looking in the camera.

Their face expressions are trying to be deep as if they are far away thinking about something.