VideoMedia

Resolves on message-finish with the concatenated Blob.

Set iff the handle settled in an error state.

id from the originating content block, if the provider sent one.

Diagnostic: false if block indices arrived out of order.

Lazy URL.createObjectURL over blob. Cached: first access creates the URL, subsequent accesses return the same one. Call revoke to free the URL slot; the next access creates a fresh URL. ThreadStream.close() auto-revokes as a safety net.

Live view of accumulated bytes. Settles with final bytes on finish.

Live byte stream.

Lazy: not materialised unless accessed. On first access the stream is seeded with every byte already accumulated (partialBytes) and then wired to future chunks. For URL-sourced blocks, first access triggers fetch() and pipes the response body through.

Repeated access returns the same ReadableStream reference — you can safely read it once, release the lock, and re-acquire a reader later (e.g. React StrictMode effect re-invokes). The standard ReadableStream.locked semantics prevent concurrent readers; use stream.tee() when you truly need multiple live consumers.

Present iff the originating block carried url (not data). When set, blob / stream / objectURL lazily fetch from here on first access.

Revoke the currently-cached object URL (if any). Subsequent accesses to objectURL create a fresh URL from the Blob. Idempotent.