HELP : How to share library items?

Hello,

I have many movies that have the same buttons. What I did was copy every button to every movie. Does making it difficult for me whenever I change the button because I will have to change every button in every movie. Takes time…

My question is, How do you make a button then save it so that it can be used by all the other movies. So if there are any changes, I will only have to change the LINK BUTTON and everything else will be changed automatically.

Thanks