Python 3 For Loop running infinitely? Why does my code not finish if it was iterated over all items in the list/set?

Question

I am trying to scrape all the video links and its corresponding titles from a facebook like page. Then I want to do a mapping where I map the videoId to its corresponding title. I want to do so, because then I can automatically download the videos and reupload them on youtube with the correct title. For some reason my code would not finish and the videoIds and its title would not get written into a json file called videoTitles.json. It just keeps running running and running.

I also tried to stop the for loops by:

if index+1==len(videoLinks):
            break

Here is the code:

from asyncio.windows_events import NULL
from msilib.schema import Error
import shutil
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from youtube_dl.utils import UnsupportedError, DownloadError
import os
import json
import youtube_dl
import ffmpeg
from datetime import datetime
import re
import sys
import argparse
import requests
import time
import os.path
chrome_options = Options()
chrome_options.add_argument("start-maximized")
chrome_options.add_argument("--disable-infobars")
chrome_options.add_argument("--disable-extensions")
chrome_options.add_argument("--disable-popup-blocking")

# disable the banner "Chrome is being controlled by automated test software"
chrome_options.add_experimental_option("useAutomationExtension", False)
chrome_options.add_experimental_option("excludeSwitches", ["enable-logging"])
url=input("Facebook-Page: ")
# global driver
driver = webdriver.Chrome( options=chrome_options)

driver.get(url)

button=WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.XPATH, "//span[text()='Alle Cookies gestatten']"))).click()

driver.implicitly_wait(10)
links=[]
links_videos_dl=[]
titles=[]



SCROLL_PAUSE_TIME = 1
  
videoLinks=set()
videoTitles=set()

info=dict()
videoTitleMapping=dict()


while True:
    last_height = driver.execute_script("return document.body.scrollHeight")
    
      
    # Scroll down to bottom
    driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")


    time.sleep(SCROLL_PAUSE_TIME)
    # Calculate new scroll height and compare with last scroll height
    new_height = driver.execute_script("return document.body.scrollHeight")
   
    
    
    if new_height == last_height:
        
        break
    last_height = new_height
    

links = [elem.get_attribute("href") for elem in driver.find_elements(By.XPATH,"//span/div/a")]
titles=[elem.get_attribute("textContent") for elem in driver.find_elements(By.XPATH,"//span/div/a/span/span")]
for index,link in enumerate(links):
   
    if link and index < 16:
        if url in link:
            videoLinks.add(link)
    
for index,title in enumerate(titles):
    if index < 16:
     videoTitles.add(title)
     
print("LÄNGELINKS", len(videoLinks))
print('LÄNGETITLE', len(videoTitles))

for index, title in enumerate(videoTitles): 
    if index+1==len(videoTitles):
        break
    for index, videoLink in enumerate(videoLinks):
        input_video=None
        input_audio=None
        if index+1==len(videoLinks):
            break
        print('videoLInksLoop')
        ydl_opts = {"format":"bestvideo/best","outtmpl":"%(id)s.%(ext)s", "ignoreerrors":True}
        try:
                
            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                
                ydl.download([videoLink])
                
                info= ydl.extract_info(videoLink, download=False, process=True)
            
                print('INFO!!!', info['id'])
                videoTitleMapping[info['id']]=title
                
                jsonVideoTitleMapping=json.dumps(videoTitleMapping, indent=4)
                

                    
                    
                if os.path.isfile(f"{info['id']}.mp4"):
                    input_video = ffmpeg.input(f"{info['id']}.mp4")
                else:
                    input_video = ffmpeg.input(f"{info['id']}.webm")
                        
                        
            ydl_opts = {"format":"bestaudio/best","outtmpl":"%(id)s.%(ext)s", "ignoreerrors":True}

            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                ydl.download([videoLink])
                print(videoLink)
                info= ydl.extract_info(videoLink, download=False, process=True)
                
                if os.path.isfile(f"{info['id']}.m4a"):
                    input_audio = ffmpeg.input(f"{info['id']}.m4a")
                
                
            
                if os.path.isfile(f"./processed/final_{info['id']}.mp4"):
                    print("File already downloaded")
                else:
                    if input_audio==None:
                        if os.path.isfile(f"{info['id']}.webm"):
                            shutil.move(f"{info['id']}.webm", f"./processed/final_{info['id']}.webm")
                        else:
                            shutil.move(f"{info['id']}.mp4", f"./processed/final_{info['id']}.mp4")
                    else:
                        print('prossing')
                        if input_video and input_audio:    
                            ffmpeg.concat(input_video, input_audio, v=1, a=1).output(f"./processed/final_{info['id']}.mp4").run()
        except:
            print('failed')
            
            
        finally:
            print('Done')
         
  

    with open("videoTitles.json", "w") as outfile:
        outfile.write(jsonVideoTitleMapping)          
          

It keeps printing out:

if os.path.isfile(f"./processed/final_{info['id']}.mp4"):
  print("File already downloaded")

and:

finally:
 
      print('Done')

What I am doing wrong here? Thanks a lot :)