M3u8WebVttInputSettings.playMode property
Playback mode. "fromStart" (default) replays the playlist from its oldest visible segment; "live" follows the live edge. Note that "fromStart" against a VOD playlist will burst cues at upstream-fetch rate rather than wall-clock — see the engine’s M3u8WebVttInput notes.
Signature:
playMode?: "fromStart" | "live";