Video laws are relaxed. Audio laws are a minefield. Under the Wiretap Act (and various state "two-party consent" laws), recording a conversation without the consent of all parties is a felony in states like California, Connecticut, Florida, Illinois, Maryland, Massachusetts, Michigan, Montana, Nevada, New Hampshire, Pennsylvania, and Washington.
For maximum privacy, choose UniFi (high cost) or Reolink (low cost) with local storage.
Your camera is a computer. The most terrifying privacy breach isn't your neighbor complaining—it's a hacker in Romania watching your child sleep. Use a 20-character password and two-factor authentication on your account. Change the default router password.