def sources(self):
        """
        Get the sources for a given experience_id, which is tied to a specific language
        :param experience_id: int; video content id
        :return: sources dict
        """
        api_url = self.sources_api_url.format(experience_id=self.experience_id)
        res = self.get(api_url, params={"pinst_id": self.pinst_id})
        return self.session.http.json(res)