Nspanel-lovelace-ui detecting media player dynamically


I have a NSPanel and used IOBroker in the past to fill the media plays card.
This worked fine and filled in all available media players in a select list.

Now I want to migrate to HA and trying to archive same thing.
And now I struggle with filling the list:

      - type: cardMedia
        entity: media_player.bad <-- can this set by value input_select.dest?
          - input_select.dest:
                - bad <-- can this list dynamically be filled with all media_player objects?
                - kuche
              state: bad

Any suggestions on this?