Emails about "account has been hacked"
This is a sextortion scam email. It is designed to frighten you into sending Bitcoin by claiming the sender hacked your device, recorded you watching adult content, and will expose your private information unless you pay.
This email is a well-known type of scam, and the claims in it are almost certainly fabricated. The message itself does not prove that your device has been hacked or that anyone has recorded you.