youtube api - waiting for video

Question

I made a bot that waits for videos from several channels and sends new ones to telegram.. Here is the code:

from distutils.log import error
from googleapiclient.discovery import build
import config
import time

import telebot
ChannelsAndVideos = []
Channels = config.channels_id
bot_token = config.bot_token
api_key = config.api_key
sleepTime = config.sleepTime
messageText = config.messageText
telegram_channels_id = config.telegram_channels_id
youtube = build('youtube', 'v3', developerKey=api_key)
bot = telebot.TeleBot(bot_token)
sended = []
for ChannelId in Channels:
    try:
        request = youtube.channels().list(
            part='statistics',
            id=ChannelId
            )
        response = request.execute()
        if(response['pageInfo']['totalResults'] != 1):
            print("Error! Не удалось добавить " + ChannelId)
        else:
            print(ChannelId + " был добавлен (" + response.get('items')[0].get('statistics').get('videoCount') + " видео)")
            ChannelsAndVideos.append((ChannelId, response.get('items')[0].get('statistics').get('videoCount')))
    except error:
        print(error.message)
while(True):
    time.sleep(sleepTime)
    for i in range(len(ChannelsAndVideos)):
        request = youtube.channels().list(
            part='statistics',
            id=ChannelsAndVideos[i][0]
        )
        response = request.execute()
        if(response['pageInfo']['totalResults'] != 1):
            print("Error!")
        else:
            if response.get('items')[0].get('statistics').get('videoCount') > ChannelsAndVideos[i][1]:
                ChannelsAndVideos[i] = (ChannelsAndVideos[i][0], response.get('items')[0].get('statistics').get('videoCount'))
                request = youtube.channels().list(
                    part='contentDetails',
                    id=ChannelsAndVideos[i][0]
                    )
                response = request.execute()
                request = youtube.playlistItems().list(
                part=['contentDetails','snippet','status'],
                playlistId=response['items'][0]['contentDetails']['relatedPlaylists']['uploads']
                )
                response = request.execute()
                if not (response['items'][0]['snippet']['resourceId']['videoId'] in sended):
                    sended.append(response['items'][0]['snippet']['resourceId']['videoId'])
                    for chat_id in telegram_channels_id:
                       try:
                            bot.send_message(chat_id, messageText + "https://www.youtube.com/watch?v=" + response['items'][0]['snippet']['resourceId']['videoId'])
                       except ...:
                           print("Не удалось отправить сообщение в " + str(chat_id))

There is a problem in its implementation: every 30 seconds it makes a request for the latest videos of each channel, so this eats up RAM and the rest of possible requests (their number is limited in the youtube api). How can I optimize this system?