I have categories:
If I open cameras, I see nothing, only:
There is currently no content classified with this term.
Instead, I want the view to automatically show the children if I click on "Cameras". Clicking on cameras should therefore show all the contents of Accessories and also bags and casings and inner and outer. If I click on Bags and Casings, it must only show bags and casings, inner and outer.
How would I do this?
Have you tried adding the contextual filter Content: Has taxonomy term ID (with depth)
of to the view? See https://drupal.stackexchange.com/a/58526