Which teacher can provide a tutorial on how to implement the live broadcast function? Just display the video and sound, nothing else!

I checked the information myself, it seems that it is collected first, then encoded, uploaded and decoded.

#Then the question is, if the video is pushed every three seconds and the recorded video is a whole video, does the video need to be divided?

How to divide it?

. . . . .

There are too many questions, I still hope the teacher can provide a tutorial