How to find out how many segments a streaming video is divided into?

Question

Video

In short, you need to download video from channel 1. I wrote a quick program that downloads segments and puts them into the stream, in general it works, but I would like to know:
1. What is the length of the streaming video itself. I can’t find the titles
2. How many segments the video is divided into,
I didn’t work with the video myself, but I didn’t find the necessary titles,