import re

def get_youtube_id(url):
    if not url:
        return None
    patterns = [
        r'(?:v=|\/)([0-9A-Za-z_-]{11}).*',
        r'(?:youtu\.be\/)([0-9A-Za-z_-]{11})',
        r'(?:live\/)([0-9A-Za-z_-]{11})',
        r'(?:embed\/)([0-9A-Za-z_-]{11})',
        r'(?:shorts\/)([0-9A-Za-z_-]{11})', # Added shorts
    ]
    for pattern in patterns:
        match = re.search(pattern, url)
        if match:
            return match.group(1)
    return None

urls = [
    "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
    "https://youtu.be/dQw4w9WgXcQ",
    "https://www.youtube.com/embed/dQw4w9WgXcQ",
    "https://www.youtube.com/live/dQw4w9WgXcQ",
    "https://www.youtube.com/shorts/dQw4w9WgXcQ",
    "https://m.youtube.com/watch?v=dQw4w9WgXcQ&feature=youtu.be"
]

for url in urls:
    print(f"{url} -> {get_youtube_id(url)}")