Playback uses your browser's built-in text-to-speech, so voices depend on your device/browser. When you record,
this app captures the visuals (stage + speech bubbles) as a downloadable video file. Browsers don't let
web pages grab their own synthesized speech audio, so the exported file is silent — play it back with "Play
episode" running alongside if you want narration, or turn on captions (shown by default) for a read-along video.