Credible videos of UFOs from other worlds do not exist in the public. That is not to say that credible evidence does not exist, just that the video footage out there is not high enough quality to determine the source of the UFOs they depict.
While the existence of UFOs is undeniable, the term is such that anything "Unidentifiable" and "Flying" qualifies. The vast majority of UFOs have been later identified. The numerous reports of flying objects by military personnel and the public that have been verified by independent sources begs the question of where these verified and unidentifiable objects came from.