The match will automatically be uploaded when the camera is connected to the internet through the provided Ethernet cable (the white one).
Here's what you need to do:
Connect your Veo camera with the provided Ethernet cable to a wall or to a router where you are sure there's the internet, just like in the image below.
If connection was lost when you were saving the recording on the app, or if you have shut down the camera without saving, don't worry: the recording will be saved as a time stamp. You'll just need to press "Upload" on the recording in the recordings list: