How to track binary region in video?

I have extracted frames from video and I trying to track binary region in image here I am using the code to draw rectangle around binary but it is not tracking binary I need to track that region in video. Please help in this. thanks in advance.

all;
    clc 
image=imread('My_image.jpg');
 BW=binary_image(image); 
BW = ~BW; st = regionprops(BW, 'BoundingBox' ); 
for k =      1 : length(st)
 thisBB = st(k).BoundingBox; rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],... 'EdgeColor','r','LineWidth',2 ) 
end