Under Internal Memory you will find all your saved videos, these do not require WiFi to access as they are on your phone's hard drive.
With the Blackvue C application you can click the three dots to select different commands to move, share, and delete the video files on the internal memory.
If you select the share command, it prompts you to a screen where you can share the video file through your messaging software or even save the video file in specific folders.
To export these videos to your computer, you have to connect it to the USB port. On Android phones you will need to locate the BlackVue folder, for iPhones you will find it under iTunes > Apps > File Sharing.
Alternatively you can also eject the micro SD card to transfer files to your computer for uploading.