Just tested again and perhaps it is possible. Although it would be nice if the UI was better/different.
- I created a new role in my IDP called Network_Admins;No_Video
- In the Meraki dashboard I created a SAML role for Network_Admins with full access to a network
- I created a Camera role with no camera permissions to anything
Logging in allows me access to all parts of the network except cameras. I can see the list of cameras, but clicking on them results in a View failed to load error. This is where I wish it would instead say camera access denied rather than looking like a broken webpage.
And this all only makes sense I suppose if the SAML admin is a network admin. Because if they have org level permissions they could simply edit the no video camera role giving themselves access.
Again I would recommend testing this all out and seeing if the behavior is the same for you.