Example (YouTube): ?url=https://www.youtube.com/watch?v=VIDEO_ID&start=30&end=90

Optional: hideVideo=1 to hide the YouTube video (audio only).

Example (direct audio): ?url=https://example.com/audio.mp3&start=0&end=60

Some direct audio URLs may require the app to be run with a server (proxy) when CORS blocks playback.