A 3-travel route watermark can be seen in the preview.

The lettering "3dreiseroute" serves as a "watermark".
This "preview" has a resolution of 1280 x 720 pixels.

Your purchased download file does not contain a "watermark" and has one
Resolution of 1920 x 1080 pixels and is provided in the format .mp4.

A 4K video version with a resolution of 4096 x 2304 pixels will be for
A later version prepared.