Is there a way to turn down the number of "Recommended for you" videos? and get more videos based on the video I am watching? I've had videos with all the recommended videos having nothing to do with the video I am watching. @TeamYouTube
To remove such videos from recommendation, tap the 3 dot menu > Not interested > Tell us why. Doing this influences how YouTube suggests videos to you in the future. Here's an article that talks about managing them: https://goo.gl/kvNus3