from requests_html import HTMLSession
from bs4 import BeautifulSoup as bs
import time

start_time = time.time()

with HTMLSession() as session:
    #p = session.post('https://www.youtube.com/playlist?list=PL3D7BFF1DDBDAAFE5')
    r = session.get('https://www.youtube.com/playlist?list=PL4fGSI1pDJn5kI81J1fYWK5eZRl1zJ5kM')
    r.html.render(scrolldown=60)#(sleep=1) scrolldown=250
    #print(r.html.html)

soup = bs(r.html.html, "html.parser")
#out = soup.find_all("meta")
out = soup.find_all('h3',class_="style-scope ytd-playlist-video-renderer")

#for i in out:
#    print(i)

print(len(out))
print("--- %s seconds ---" % (time.time() - start_time))