QuickTime movie file (.mov)

def is_mov(file_path: str) -> bool:
    """Check if file is a valid MOV by magic bytes at offset 4."""
    signature = bytes([0x6D, 0x6F, 0x6F, 0x76, 0x00])
    with open(file_path, "rb") as f:
        f.seek(4)
        return f.read(5) == signature

function isMOV(buffer: Buffer): boolean {
  const signature = Buffer.from([0x6D, 0x6F, 0x6F, 0x76, 0x00]);
  if (buffer.length < 9) return false;
  return buffer.subarray(4, 9).equals(signature);
}

func IsMOV(data []byte) bool {
    signature := []byte{0x6D, 0x6F, 0x6F, 0x76, 0x00}
    if len(data) < 9 {
        return false
    }
    return bytes.Equal(data[4:9], signature)
}