es7.js

async search(substring) {
        const url = `${SEARCH_URL}${encodeURIComponent(substring)}`;
        const response = await fetch(url);
        const $ = cheerio.load(await response.text());
        const videoElements = $(VIDEO_CLASS);
        const getIdSelector = id => `${VIDEO_CLASS}[data-context-item-id=${id}]`;

        return Array.from(videoElements).map((videoEl) => {
            const id = videoEl.attribs['data-context-item-id'];
            const idSelector = getIdSelector(id);

            return {
                id: id,
                thumbnail: `https://i.ytimg.com/vi/${id}/hqdefault.jpg`,
                title: $(idSelector).find('.yt-lockup-title > a').attr('title')
            }
        });
    }