What is the ruling on taking legally permissible clips from YouTube without the owners' permission? What is the ruling on lying in jest that harms no one and benefits the one who tells it? And do permissible advertisements become unlawful if they include some violations?

Permissible video clips that were not prohibited from being taken or whose copyrights were not reserved: It is permissible to take them, unlike copyrighted or protected ones, which may not be taken except with the permission of their owners. Lying for the sake of joking is forbidden, even if the listener is aware of it. Promoting what is permissible is permissible, but it must not include any evil. If it does, then its owner has combined what is permissible with what is forbidden.