I don’t have any experience with the drone but according to the manual it should just be a case of taking the SD card out of the drone and reading said SD on a PC/Mac.
4.7.3 Image Storage
The videos and pictures recorded by ATOM will be stored in SD card, instead of App or user’s album. Make sure
to insert SD card prior to flight. Otherwise, it is unable to record and shoot.
User can preview and download the videos and pictures (the drone and the remote controller should be
connected) in App.
SD Card Requirements
File format: FAT32, exFAT
Capacity: 4G-256G
Speed requirements: It is suggested to use SD card above U1 (UHS Speed Class 1) or C10 (Class 10)
The video downloaded from App is just 720P image used in video transmission. Please read SD card with computer or other device in order to acquire videos of higher definition.