movie trailers

so I am working on the dialogvideoinfo.xml I know button id 11 is supposed to launch the trailer….

I have the button setup but I know I do not have the trailer local. so is there a way to make it pull the trailer from youtube….

also the button is still showing I have

Code:
<visible>!String.IsEmpty(ListItem.Trailer) + ![String.StartsWith(Container.FolderPath,plugin://) + String.Contains(Container.FolderPath,trailer)]</visible>

I want the button to hide when there is no trailer available… I do not have the youtube addon installed at the moment either.

any ideas?