[How to develop a website or app for video live streaming?]

Great Idea Smith! You can develop a live streaming website in different ways

Custom development, Readymade Solutions and more.

 

I think readymade solutions is the best choice and it takes less cost compared to custom development.  And also save your time and so on.  Many readymade solutions are ready in the market like Contus Vplay and etc.  Thinking of the cost depends upon your requirement.