/**
 * Decorative / background `<video>` autoplay helpers (Safari, WebKit, cold load).
 * `Video.svelte` uses `applyInlineVideoPlaybackFlags`, `subscribeDecorativeVideoAutoplayAttempts`,
 * and its own richer `play().catch(...)` handling.
 */
/** Sets `muted` and `playsInline` for autoplay-heavy inline video. */
export declare function applyInlineVideoPlaybackFlags(el: HTMLVideoElement, options: {
    preferMuted: boolean;
    mutedPlaybackOverride: boolean;
}): void;
/**
 * One programmatic `play()`; on rejection while unmuted, force muted playback and retry once.
 * Honors `cancelled()` and ignores detached elements before mutating reactive state.
 */
export declare function tryDecorativeAutoplayWithMuteFallback(el: HTMLVideoElement, context: {
    cancelled: () => boolean;
    preferMuted: boolean;
    getMutedOverride: () => boolean;
    setMutedOverride: (muted: boolean) => void;
}): void;
/**
 * Registers `loadeddata` / `canplay` (when needed), microtasks, rAF, and `window` `load`
 * retries for cold-start autoplay scheduling.
 */
export declare function subscribeDecorativeVideoAutoplayAttempts(el: HTMLVideoElement, tryPlay: () => void, isCancelled: () => boolean): () => void;