This scam has been around for a few years and all the scammers do each year is change the content of the email message. So, do not send them your money because the scammers do have the video they claim they have of you.
Also, the scammers may have your old password, which makes the scam look legit, but it doesn't mean that they have anything on you. It appears they may have gotten your old password from the Yahoo or other internet hacks or data breaches that took place a few months or years ago. Yahoo and the companies who suffered the data breach have forced their users to change their passwords, so they should have nothing to worry about.
A "Drive-by Exploit" Scam
Subject: Save Yourself
Subject: Video Of You
Hi, I know one of your passwords is:
Your computer was infected with my private malware, your browser wasn't updated / patched, in such case it's enough to just visit some website where my iframe is placed to get automatically infected, if you want to find out more - Google: "Drive-by exploit".
My malware gave me full access to all your accounts (see password above), full control over your computer and it also was possible to spy on you over your webcam.
I collected all your private data and I RECORDED YOU (through your webcam) SATISFYING YOURSELF!
After that I removed my malware to not leave any traces and this email(s) was sent from some hacked server.
I can publish the video of you and all your private data on the whole web, social networks, over email of all contacts.
But you can stop me and only I can help you out in this situation.
The only way to stop me, is to pay exactly 800$ in bitcoin (BTC).
It's a very good offer, compared to all that horrible **** that will happen if I publish everything!’
You can easily buy bitcoin here: www.paxful.com , www.coingate.com , www.coinbase.com , or check for bitcoin ATM near you, or Google for other exchanger.
You can send the bitcoin directly to my wallet, or create your own wallet first here: www.login.blockchain.com/en/#/signup/ , then receive and send to mine.
My bitcoin wallet is:
Copy and paste my wallet, it's (cAsE-sEnSEtiVE)
You got 3 days time to pay.
As I got access to this email account, I will know if this email has already been read.
If you get this email multiple times, it's to make sure that you read it, my mailer script is configured like this and after payment you can ignore it.
After receiving the payment, I will remove everything and you can life your live in peace like before.
Next time update your browser before browsing the web!