If you do not use annotations on your videos, but would like some ideas as to how they can be used to your benefit…you will want to click over to 10+ Ways To Use YouTube Annotations. There are some examples shown with explanations.
I have experimented with annotations for a while now and find different videos need different types of annotations. You may not be able to use the same thing over and over, so get some ideas to try out…see what gets clicks and what doesn't. Since annotations can be changed at anytime…you have a chance for testing.