That is a really odd experience. I do remember some times where I talked about something on Skype (most likely in messages, but I don't remember for sure) and then it appeared in my recommended videos and I thought that was really weird... I've had a couple of incidents like that, however none with FeralHeart like that. It could very well be that you have a keylogger on your computer without your knowledge but I don't know enough about this to confirm if that is what it could be. I would definitely do some research if you have concerns. I know there is probably a way to tell if you have a keylogger on your pc, either through a virus scan (if it was installed maliciously) or through other means.