Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Or install NMAP on your comp and run (literally lots of commands will work and it is really about preference on which command you choose to use as many will flat state or at least give hints to which IP is that of your pi.) man nmap to get the proper command ideas to input. Try nmap -O ###.###.###.1-254 which will give details about the OS each connected device is using, for example.
Follow this link: blog.miguelgrinberg.com/post/… After you run through the steps in the link, comment to let me know and I can help you through the configuration details to allow remote access to the feed.
What else have you tried? Are you familiar with port forwarding? I've created a system similar to what you have described and would be happy to help. Just need more information on your progress thus far.
90% of the time people never change the login credentials from the factory defaults. If you can actually get your hands on the router, there is a very good chance that the username is admin and the password is the serial number. Or just locate the make and model and google search the default login credentials.