input: 
  def fetch_trending_videos() -> list:
      """ Fetch and return the top ten trending YouTube video titles.
      >>> fetch_trending_videos()
      ['Video Title 1', 'Video Title 2', 'Video Title 3', 'Video Title 4', 'Video Title 5', 'Video Title 6', 'Video Title 7', 'Video Title 8', 'Video Title 9', 'Video Title 10']
      """
  
output:     return ['Video Title 1', 'Video Title 2', 'Video Title 3', 'Video Title 4', 'Video Title 5', 'Video Title 6', 'Video Title 7', 'Video Title 8', 'Video Title 9', 'Video Title 10']