What are the names of one direction members in their musical video best song ever?

In the music video for One Direction's song "Best Song Ever," the band members do not appear as themselves. Instead, they play the roles of various fictional characters, including:

- Niall Horan as a police officer

- Zayn Malik as a genie

- Liam Payne as an astronaut

- Harry Styles as a pirate

- Louis Tomlinson as a cowboy