Is it permissible to give a copy of a debate by Sheikh Ahmed Deedat, in which an unveiled woman appears, to non-Muslims or Muslims, and is it permissible for two people, one Muslim and the other non-Muslim, to watch it together?

It is permissible to gift a copy of a debate that effectively persuades Christians to the truth, even if there is a disrobed woman in the video, because the objectionable element is secondary, and what is permissible secondarily is not permissible independently. If it is possible to obscure the woman's image, that would be more complete. There is no difference between enabling a Muslim or a non-believer to access prohibited images; it is not permissible to give them what is believed to be forbidden.