First of all, the video file should be processed, because the mobile phone system can only transmit MP4 files, and the size can't exceed 25M, so it can be converted into MP4 "low quality and low size" by "format factory". After conversion, as long as the video file does not exceed 7 minutes and 40 minutes, and the converted file does not exceed 25 meters, it can be saved in the mobile phone and forwarded to others. The method is: through the file transfer assistant of WeChat, first log in to WeChat on the computer, press "Login" on the mobile phone, drag the video file of the memory card into the file transfer assistant, and then press "Send" to send the file to the file transfer assistant of the mobile phone, so that it can be saved or forwarded.