I cannot figure out how to delete a show after I watch it (using Apple TV 4+.) I get options to make it as watched, etc but there is no way to delete any show. I can delete using my iPad app and that is the only way I've found.
If you're not seeing the Trash buttons shows, you might want to check your Settings.
Settings > Library > Allow Deletion
This option allows you to hide/show the Trash buttons.
Thanks. That was the problem.