Media blocks

Four variants, one shape: image, video, audio, document.

Config

• Source — toggle between Hosted URL and Upload
  • URL: paste any publicly-accessible link
  • Upload: drag-and-drop a file → uploaded to Meta + media_id stored
• Caption — short caption shown under the media (not allowed on audio)
• Filename — document only, optional (defaults to the uploaded file’s name)
• Voice — audio only, marks the audio as a voice note (different UI in WhatsApp)

Meta size + format caps

• Image: 5 MB (jpg, png, webp)
• Video: 16 MB (mp4)
• Audio: 16 MB (aac, m4a, mp3, ogg)
• Document: 100 MB (any common MIME)

Behaviour

Same as text — auto-advance via Continue socket after Meta acceptance.