From what I can garner from the video, the conversation is mostly about the practicality of the J-31 as a carrier plane. The story frequently draws comparisons between the J-31 and the F-35, including the F-35's variants. In my opinion, one of the important parts of the video is when they mentioned that if the J-31 ever serves aboard a carrier, it would need several changes, such as a higher payload capacity. Another interesting bit is about the future indigenous aircraft carriers and their potential to carry the J-31.