custom add media button

Hi,

I am using a javascript for embedding youtube videos and am thinking of an easy way to integrate the script into new posts.

The idea to create a button as one of the “Add Media” buttons.

If I wanted to do that how do I go about it?

I am using javascript because it allows me to have access to youtubes full api, for things like starting a video at different times, starting muted and a few other things.