How can I edit showreels?

In the menu, click on "Manage media" and then on "Showreel Manager".

On the left-hand side you will see an overview of the currently selected showreel. On the right-hand side, you will see all uploaded videos (or audios). You can drag and drop videos from the right-hand side to the currently selected showreel on the left-hand side.

By default, showreels are publicly visible in your Filmmakers profile. To change this, click on "Edit showreel" and deactivate the checkbox next to "Filmmakers profile (publicly visible)" in the "Showreel visibility" section.