Is it obligatory for a daughter to send a series of Islamic da'wah videos to her father, who has little faith and sometimes curses religion, given her fear of his negative reaction?

If the father is in the mentioned state of deviations and dangerous ideas, firstly, one must frequently supplicate for his rectitude and guidance. Secondly: He must be advised gently and reminded of Allah and the ill consequences, while also having some virtuous people address him, in the hope that they might be a cause for his guidance. Thirdly: There is no harm in sending the mentioned da'wah series if its impact is expected, for the possibility of the video maker's absence does not prevent inviting him to guidance; this is among the greatest acts of righteousness towards him. However, if it is highly probable that the opposite of what is hoped for will occur, then it should be abandoned, and other means should be employed.