The Spotify integration was my first use of a media player on Home Assistant and I was thinking my fresh eyes could contribute some minor improvements to the documentation. Before I open a pull request …
The Media section in the UI is the easiest place to try it out. Foolishly I didn’t notice the media browser. Is there documentation we can link to?
I could only find these release notes 0.115: B-Day release! Media browser, tags, automations & WTH - Home Assistant
Source selection is important to understand (i.e. if none is selected nothing will play) and these are the names defined by the Spotify API so unlikely to perfectly match the entity names in Home Assistant.
I believe no sources show until you use the Spotify App (phone or website) to play on a device. It may help to understand that if the device isn’t Spotify Connect (i.e. Google Cast) the source won’t persist, so this integration cannot initiate playback on a Chromecast. If anyone can confirm this we could try to explain it.
A third point, the
media_content_id must have the correct corresponding media_content_type. It can be a URL or the Spotify URI string
spotify:playlist:37i9dQZF1DWVFeEut75IAL both work.
Most experienced users will already know this. Let me know if you can confirm any of the three points above and if you think these be welcome additions to the documentation