How can I disable the transfer of individual showreels to Spotlight?

When creating a new showreel, you have the option to configure its visibility. By unchecking the option "Visible on Spotlight", you can deactivate its transfer to Spotlight:

For existing showreels, you can adjust the setting at any time. To do this, click on the "Visible on Spotlight" option for the respective showreel. In the form that opens, you can change the visibility.