![](/media/upload/cms_19/N1%20Dual/Now%20back%20%E7%95%8C%E9%9D%A2-10.png)
● Preview video
After the App is successfully connected to the dash cam, enter the real-time preview interface, click the horizontal screen button, and the real-time picture will automatically switch to the full-screen preview mode.
● Playback video
1. Enter the preview interface, and tap on the screen will display the progress bar;
2. Drag the progress bar to select the time starting point to view;
3. Click on the thumbnail or wait for 5 seconds to start playing the previously recorded video.
![](/media/upload/cms_19/N1%20Dual/%E5%9B%BE%E6%A0%87/note%20%E5%9B%BE%E6%A0%87.png)
When video playback is performed, the dash cam will pause recording.
● Download video
1. Enter the preview interface, and tap on the screen will display the progress bar;
2. Drag the progress bar to select the time starting point to download;
3. Tap Download to start downloading, and tap Complete to finish downloading. After downloading, the file is saved to the local photo album, which can be shared and deleted.
![](/media/upload/cms_19/N1%20Dual/%E5%9B%BE%E6%A0%87/note%20%E5%9B%BE%E6%A0%87.png)
The longest video can be downloaded at one time is 3 minutes and the shortest is 5 seconds.