thumbnail upside down

Hi all

I am using an iPhone 11 Pro with The DJI OM 4 SE To create video’s. Am using the DJI Mimo app for the video recording.

When I upload an unedited video to a website, the thumbnail is shown upside down.

When making the video in landscape mode, the volume buttons are below and the on/off button is up. When the video starts, the orientation is correct.

Who knows how to fix this?