Why the URL will not play in a browser
Modern browser media does not natively decode RTMP. The live source needs a browser-compatible delivery workflow.
Playback and stream checks
An RTMP URL is a contribution address, not something a modern browser media element plays on its own. Check an accessible feed with a native tool, use Multiview for an operator view, and configure browser delivery for the audience.
Temporary RTMP workspace
The workflow
Modern browser media does not natively decode RTMP. The live source needs a browser-compatible delivery workflow.
ffplay or VLC can open an accessible RTMP URL. Callaba Multiview gives operators a browser-based view of a selected RTMP stream.
Set up a Web Player or HLS path for the audience, including the endpoint and access model the viewer needs.
Configuration
ffplay "rtmp://host/app/stream-key"Connection access
With controlled stream access, publisher and receiver use the name the operator configured. In Guest mode, the publisher chooses a non-empty name and the receiver uses that same name; anyone with the open endpoint can use it.
Continue with the exact job
No. Modern browser media elements do not natively play RTMP. Use a separately configured browser delivery workflow such as HLS where that is the appropriate path.
No. Multiview is an operator observation module for selected streams. Viewer playback requires its own delivery and access design.