input: 
  from typing import List
  
  
  def extract_youtube_video_titles(url: str) -> List[str]:
      """Extracts titles of all YouTube videos from a given URL.
      >>> extract_youtube_video_titles("https://www.youtube.com/user/Thexvid/videos")
      ['Video Title 1', 'Video Title 2', 'Video Title 3']
      """
  
output:     import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.text, 'html.parser')
      titles = [title.text for title in soup.find_all('a', class_='yt-uix-tile-link')]
      return titles