If you received a motion detection alert from CameraFTP, it means the image was uploaded to CameraFTP. You can log on to CameraFTP.com website and play back the footage. You can start from a time that is a couple minutes before the event.
If you use image recording and the upload frequency is low, it may not be able to catch all events. You can increase your camera's upload frequency, or change to video recording. (If your camera is capable of).
I noticed that your camera's recording parameters exceed the parameters of your subscribed plan. You can re-configure your camera to upload based on your plan parameters, or upgrade your subscription to match your camera's recording parameters.