Blackmail Email

I have recently received an email from my own email address, it claimed to have hacked my email and phone. It claimed I had been to **** websites and the had videos of me after hacking into my webcam (I don’t own a computer only a phone) is this a scam or can they really hack into my phones camera and watch me? I’m not real concerned about it because I don’t visit those websites but if they could hack into my camera they could make it seem like I’m doing anything, they threatened to send it to my contacts?