export declare const constants: {
    urls: {
        base: string;
        search: {
            base: (terms: string) => string;
            filters: {
                video: string;
                channel: string;
                playlist: string;
                film: string;
                programme: string;
            };
        };
        video: {
            base: (id: string) => string;
        };
        playlist: {
            base: (id: string) => string;
            baseUrlRegex: RegExp;
            getIdRegex: RegExp;
            continuation: (key: string) => string;
        };
        channel: {
            base: (id: string) => string;
        };
    };
    requestOptions: {
        userAgent: string;
        maxRedirections: number;
    };
    errors: {
        type: (key: string, expected: string, received: string) => string;
    };
};