Search the shared reference catalog of top-performing creator videos. Defaults to the brand's niches and content language (language 'all' disables the language filter). niche accepts a catalog niche slug, several separated by commas, or free text that is mapped to slugs; '' or 'all' disables the niche filter. Catalog niches: negocios, lifestyle, imoveis, saude, medicina, beleza, vendas, estetica, marketing, startups, financas, carreiras, tecnologia, culinaria, fitness, design, direito, estudos, arquitetura, humor, viagens, ciencia, maternidade, esportes, moda, crypto, odontologia, musica, fotografia, pets, idiomas, psicologia, espiritualidade, varejo. The response reports the niches applied (niches, nicheSource); when no video matches the niche on the first page the search is retried across every niche and nicheRelaxed is true. query understands format names, funnel phrases (tofu/mofu/bofu) and presentation modes (text on screen / spoken), and matches the rest against captions and handles. format is a taxonomy slug. sortBy: views (default) | virality (engagement rate) | recent. Creators the brand hid are excluded. Paginate with limit (max 100) and offset.