Camera.play_stream not working on Google cast, only Google cast logo visible

When casting a camera with camera.play_stream to a google nest hub only the chromecast icon is showing up. The camers is a Foscam, but it happens with also if camera entity is based on RTSP platform.

Camera does show video in HA lovelace.

HA version: 0.118.4

’ - platform: generic
still_image_url: http://ip:rtsp-port/
stream_source: rtsp://usernameXXX:[email protected]:rtsp-port/videoMain
name: Camera

Did you ever find a solution? I’m running into the same thing