What does C2 button do by default? Playback?

[kodiak1120]

My Mavic is set to center-focus for the C1 button, but the C2 button is set for "playback." What does playback do?

 

[laura schlenker]

Must play back the video I'm assuming?

 

[thead]

mine is set to playback also and doesn't play video or do anything when i press it. does anyone know what playback means

 

[4wd]

I have a hard time choosing anything useful for it.