Hello,
I have reviewed the requirements and I am pleased to write that we have experienced developers who can work on your project to provide you the algorithm that can analyse the video and detect the moving objects on the screen.
Each project is unique and it is very important for us to understand what your vision is. Let me know when you are free to have a quick chat and perhaps we can make some recommendations based on our experience as well. Thanks, hope to speak to you very soon!