So the only way for this company to succeed is if their videos are so good that the targets never realize they're fake. I'm no entrepreneur, but it doesn't seem ideal if your business model is literally based on lies.
Not to mention, if the technology is that good, then it will be trivial to abuse this for corporate espionage, phishing, blackmail, slander, etc. Sure, if they don't do it, someone else will, but that's never been a valid excuse.