Types

interface ReelQuality {
  uri: string;
  bandwidth?: number;
  width?: number;
  height?: number;
  label?: string;
}

type PrefetchStrategy = 'symmetric' | 'directional';
type InitialQuality = 'auto' | 'low' | 'high';

interface ReelData {
  id: string;
  videoUri: string;
  posterUri?: string;
  /**
   * Clip length in seconds. Strongly recommended with `showProgressBar` —
   * without it the bar waits for native metadata and can lag on large remote files.
   */
  duration?: number;
  /** Progressive quality ladder when not using HLS/DASH on videoUri. */
  qualities?: ReelQuality[];
  /** Higher = prefetch earlier when prefetchEnabled. */
  prefetchPriority?: number;
}

interface OverlayMeta {
  index: number;
  isActive: boolean;
}

interface VideoMeta {
  isActive: boolean;
  muted: boolean;
}

interface VideoBufferConfig {
  minBufferMs?: number;
  maxBufferMs?: number;
  bufferForPlaybackAfterRebufferMs?: number;
  /** Android disk cache size in MB; iOS needs Podfile flag. */
  cacheSizeMB?: number;
  preferredPeakBitRate?: number;
  preferredMaximumResolution?: { width: number; height: number };
}

/** Default when videoCacheEnabled is true and cacheSizeMB is unset. */
declare const DEFAULT_VIDEO_CACHE_SIZE_MB: 100;

interface FlashReelsRef {
  scrollToIndex: (index: number) => void;
  play: () => void;
  pause: () => void;
}

Extend ReelData with your own fields and pass a typed data / renderOverlay:

type Reel = ReelData & { username: string; caption: string };