Live video is a system and a platform. Not software. Need a combination of software, hardware and network. So as soon as you heard this question, you knew it was asked by an amateur. If you want to make your own system platform, you need to buy a server and handle the network cable. Then do the software, or use the website to broadcast directly. Finally, the license plate. Webcasting requires a media license, and millions cannot apply for this license. Anything without a license is illegal live broadcast.
Of course, money can solve it. If not, forget it.