You can use this behavior to your advantage though. I have my browsers set up to delete cookies when they are closed and from the surface this works for Youtube

You can use this behavior to your advantage though. I have my browsers set up to delete cookies when they are closed and from the surface this works for Youtube recommendations. If I open the site I only get very generic popular/pushed content. So after I watch that instrumental music video, there will be a mass recommendation for other instrumental music. And that's nice, because I apparently was in a mood for that. And the next day, I open my browser again and they are all gone! I can dive into the music for the mood of that moment right away.