I'm guessing that you are talking about the "End Cards" you can display at the end of your videos.
It is possible to turn these off and you can also control what videos are being displayed at the end of them.
If you go into your video manager settings, go to edit, then go to the top right section where it says "End Cards." There you pre-select a template of your choice then click on the pencil icon on the right to control what videos are displayed from your Youtube Channel.
Hope that helps and answers your questions. =]