whenever i try to download a video, im hit with a bad gateway error.

this is the code:

import telebot
from pytube import YouTube

bot = telebot.TeleBot("7297640965:AAETe0hgv98gOnJININNfczEeBMRJyI9b7s", parse_mode=None)

# Variable to keep track of the state
awaiting_link = False

# Command handler for /start
@bot.message_handler(commands=['start'])
def send_welcome(message):
    bot.reply_to(message, "Howdy, how are you doing?")

# Command handler for /help
@bot.message_handler(commands=['help'])
def send_help(message):
    bot.reply_to(message, "This is a test bot! Send /yt_download to download a YouTube video.")

# Command handler for /yt_download
@bot.message_handler(commands=['yt_download'])
def request_video_link(message):
    global awaiting_link
    awaiting_link = True
    bot.send_message(message.chat.id, "Please send the YouTube video link you want to download.")

# Message handler for text messages
@bot.message_handler(func=lambda message: True)
def handle_message(message):
    global awaiting_link
    if awaiting_link:
        try:
            yt = YouTube(message.text)
            highest_quality_stream = yt.streams.get_highest_resolution()
            bot.send_message(message.chat.id, f"Downloading video: {yt.title}")
            video_path = highest_quality_stream.download()  # Downloads the video to the local directory
            with open(video_path, 'rb') as video:
                bot.send_video(message.chat.id, video)
            os.remove(video_path)  # Remove the video file after sending
            awaiting_link = False  # Reset the state
        except Exception as e:
            bot.send_message(message.chat.id, f"An error occurred: {e}")
            awaiting_link = False  # Reset the state
    else:
        bot.reply_to(message, message.text)

# Start the bot
print("Listening ...")
bot.infinity_polling()

i tried using chat gpt to get help but it didnt do much help. i found a bunch of other telegram bots that do the same thing on git hub bit ive got the same issue with them too.