I am a chrome user and have been having a similar problem for at least 4 months. First, I realized random videos from all over the world in my watch history that I never clicked or saw before. When I clicked them I saw that they had been liked by me. Even when I am actively watching videos on youtube these weird videos are being added to my recent videos/history. I tried to clean viruses, send e-mails to google and youtube but none of them didn't worked. 4 months later, random videos still appear in my history, some are liked and some are disliked by my account. And for about 3 months, random voices from different videos interrupt my tabs. Even when there is no video in the tabs they still get interrupted by these
youtube videos/voices. I don't know how to fix this and gave up on trying 
. Please let me know if you have a solution.