Even if the video or movie is in the U.S. public domain, or just trailers or personal media; the forum has determined that it is just too difficult to determine what is permissible or not Internationally. There are many sites offering content (usually streaming) but they have made agreements (read money) with copyright holders to distribute and they in turn get compensation usually advertisements or direct visitation to a web page with ads. Circumventing these protections is in violation of forum rules and perhaps international law.
Kodi is open sourced media software, and it's use is entirely at the discretion of the user, the forum does not condone, facilitate or advocate breach of copyright. https://kodi.tv/about/