Given a playlist URL of YouTube videos, calculate the running time length given a specified watching speed.

youtube_duration_playlist.py

from collections import namedtuple

from bs4 import BeautifulSoup
import requests


Time = namedtuple('Time', 'hr min sec')

def playlist_duration(url, speed=1):
    source = requests.get(url)
    soup = BeautifulSoup(source.text, 'lxml')
    videos = soup.find_all(class_='timestamp')
    
    hours, minutes, seconds = 0, 0, 0
    for video in videos:
        time = video.text
        m, s = map(int, time.split(':'))
        minutes += m / speed
        seconds += s / speed
        if seconds >= 60:
            seconds -= 60
            minutes +=1
        if minutes >= 60:
            minutes -= 60
            hours += 1
    return Time(int(hours), int(minutes), int(seconds))