from pytube import YouTube

# Asks the User for a youtube video URL.
def get_video_url():
    try:
        video_url = input('YouTube video URL: ')
        return video_url
    except Exception as e:
        print(f"An error has occured: {e}")

# Download the video.
def video_download(video_url):
    try:
        youtube = YouTube(video_url)
        video = youtube.streams.get_highest_resolution()
        video.download()
    except Exception as e:
        print(f"An error has occured: {e}")

def main():
    try:
        video_url = get_video_url()
        video_download(video_url)
    except KeyboardInterrupt:
        print("\nSession ended by user.")
    except Exception as e:
        print(f"{e}")

if __name__ == "__main__":
    main()