My claim is that the drone is moving backward at the 13 second mark, so based on the video you showed, the drone is not able to keep up with the train.
It is moving forwards and backward before that so moving backward is not an indication that it "cannot keep up".
It is moving backward since it is losing speed over time, when in the air, so the train moves faster compared to the drone.
Why would it lose speed? What makes it lose speed? By the time it takes off it is moving at the same speed as the train. Why would it lose that speed by taking off?
Why can you not explain how this mechanism works that you are proposing?
Because I do not have to. You are the one posting a video of a drone that is not able to keep ut with a moving train, as seen at the 13 second mark of the video you linked, the why seems irrelevant to me. If you want to figure out why, do your own research on the subject, I am not going to do it for you.
It is moving forwards and backward before that so moving backward is not an indication that it "cannot keep up".
Why would it lose speed? What makes it lose speed? By the time it takes off it is moving at the same speed as the train. Why would it lose that speed by taking off?
Why can you not explain how this mechanism works that you are proposing?
Because I do not have to. You are the one posting a video of a drone that is not able to keep ut with a moving train, as seen at the 13 second mark of the video you linked, the why seems irrelevant to me. If you want to figure out why, do your own research on the subject, I am not going to do it for you.
It is perfectly able to keep up. It is moving forward and backward.