Unable to get content dynamically generated by js

[noecs]

Hello, the webpage I want to crawl, because it is a node dynamically generated by js. So I try to use Geziyor to get the content I want, and I have two questions.
First, I used the official example to get the attribute value of the src of the video tag, and it was still unable to print out the attribute value (code is below).
Second, whether the content dynamically generated by js can open multiple requests like getting a static page.

package main

import (
	"fmt"
	"github.com/geziyor/geziyor"
	"github.com/geziyor/geziyor/client"
)

func main() {
	geziyor.NewGeziyor(&geziyor.Options{
		// set UserAgent
		UserAgent: "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1",
		//
		StartRequestsFunc: func(g *geziyor.Geziyor) {
			g.GetRendered("https://m.douyu.com/100", g.Opt.ParseFunc)
		},
		// Handle response
		ParseFunc: func(g *geziyor.Geziyor, r *client.Response) {
			if src, ok := r.HTMLDoc.Find("#html5player-video").Attr("src"); ok {
				fmt.Println("src is:", src)
			}
		},
	}).Start()
}

[musabgultekin]

Hi, in https://m.douyu.com/100 page, I don't see src value of video player. Are they changed the html?