Cast a Youtube Live Video to Google home

Hello Guys

I am working on a new script that will allow playing youtube live video on my google home devices.

I was able with the support of this forums and HA documentation to come prepare the below yaml code which is supposed to play the stream with no errors but it looks that I missed something. No music is getting played.
Please can you check what i did wrong ?

alias: Play Music For Jimmy
  - data:
      media_content_type: cast
      media_content_id: ' { "app_name": "youtube", "media_id": "Pq4QWh8SAmQ" }'
    service: media_player.play_media
      entity_id: media_player.living_room_speaker
mode: single

Hi there. I’m facing the same issue. I tried changing media_content_type to video or music unsuccessfully.

It would be nice to be able to use this automation to play music on a goole home or mini as an audio alarm.