State verification

Error states

Five independent players exercise the public state contract. Network controls are scoped to their labelled player and leave every other showcase surface untouched.

Preparing isolated media controls…

Hard-invalid input

Configuration error

Waiting

An empty source list renders the black configuration surface without Retry.

Unreachable source

Startup media error

Waiting

A missing media object fails before the first frame and offers Retry immediately.

Automatic recovery

Mid-playback error

Waiting

Start playback, then Break the tagged stream. Heal restores transport before the player's own Retry resumes from the stall.

0 requests · 0 blocked

Delayed response

Buffering

Waiting

Enable Delay, then start playback to hold buffering past the 300ms threshold.

0 requests · 0 blocked

Public seek

Ended and replay

Waiting

Jump near the end through the page API to reveal the final frame and Replay.

0 requests · 0 blocked