Multi-threaded program to get simultaneous video list from channels mentioned in a text file

yt_channel_videos.py

import time
import threading   #standard python muti-threading library
#YouTube bot to make a YouTube videos list (no API token required)
from yt_videos_list import ListCreator #https://pypi.org/project/yt-videos-list/

my_driver = 'firefox' #Selenium driver to use
#increase scroll time if program ends prematurely or slow internet
lc = ListCreator(driver=my_driver, scroll_pause_time=2)

number_of_threads = 3 #number of channels to parse simultaneously
path_to_channel_urls_file = 'channels.txt' #mention channel url in sperate lines

with open(path_to_channel_urls_file, 'r', encoding='utf-8') as file:
    for url in file:
        #add 1 since main thread counts as a thread
        while threading.active_count() == number_of_threads + 1: 
            #wait 5 seconds before checking to see if a previously running thread completed
            time.sleep(5)
        thread = threading.Thread(target=lc.create_list_for, args=(url, True))
        thread.start()
    thread.join()