Sorry for the troubles with the video, does the issue happen in the original footage? As Geebax mentioned, please upload a short original sample video to Google Drive or Dropbox and post the link here for further support. Thank you in advance.
OK, that is a camera fault, most often the cause is the ribbon cable between the camera and the main body of the aircraft. It is possible to replace it yourself.
Thanks for the video, it is recommended to send in the drone to our repair center for the diagnosis, our repair team will help get it solved. Please contact our support team www.dji.com/support to start a ticket.