Media_play does not work

Configuration
36

Thanks @antimage, by using ‘?authSig=’ as search term and getting as first result your same link and as second the basic “Media Source Integration” where it states in its example to set the contentId for local media to:
media-source://media_source/<media_dir>/<path>

So instead of using
media_content_id: https://myDuckDnsUrl.duckdns.org:8123/media/local/castle-doorbell-chime.mp3

I used
media_content_id: media-source://media_source/local/castle-doorbell-chime.mp3

I feel so unsmart :sweat: :joy:

But also happy! Whoohoo Fixed! now I can ring my doorbell!