get the box position of a specific object in the video

Hi, thanks for your code! I am trying to get one specific object box position in the entire video. My vide is 30s and it has kind of busy frames in terms of an object in each frame. I am just looking for extracting one of the object's box position in all frame. I have specific car in the entire video which I would like to capture the box position of that unique car during the video. As far as I understood, we have information about each object in each frame but we do not have a unique ID for each object, we have for example 10 _car_s in 20 frames so in each frame we have 10 car as a label but we do not know which one is which one. Do you have any idea how can I get one specific object's box position in the entire video? Thanks!