So if you make a video and people click out of YouTube when it's over they see that as a bad thing. So the best thing for your video to rank is to point the viewer to another video. Either your own video or someone else's.
I suggest pointing people to a video similar to yours.
This is kindof a weird thing and might not always work for what you are trying to do online so don't sweat it. It's always best to serve your brand before YouTube but sometimes serving your brand means ranking in YouTube.
Let us know if this is something you would like us to go deeper on in a video by commenting!