useVideoPlayer

Bind a VideoMedia handle to a caller-owned <video> element.

Contract

• The caller renders <video ref={videoRef}> and styles it however they like; the hook never injects DOM nor overrides layout.
• On message-finish, the underlying blob URL is minted and assigned as video.src. Progressive playback of streamed container video (fragmented mp4 / webm via MSE) is out of scope for this version; status stays in "buffering" until the blob resolves.
• Element events (play / pause / ended / timeupdate / loadedmetadata / error) are translated into the shared PlayerStatus enum.
• On unmount, media.revoke() is called to free the object URL.