[Python] Requests and BeautifulSoup to get video length from YouTube

In getting the video length from a YouTube url, Inspect from web browser shows there's a line:



Then I use requests and BeautifulSoup to get it:

import requests
from bs4 import BeautifulSoup

url = "https://www.youtube.com/watch?v=ANYyoutubeLINK"

response = requests.get(url)
response.raise_for_status()

soup = BeautifulSoup(response.text, 'html.parser')

duration_span = soup.find_all('span', class_='ytp-time-duration')

print (duration_span)


Neither "soup.find_all" nor "soup.find" works. What went wrong?

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