OK, so for example, if I am using confluence (on Frodo) I can find some IDs as follows.
- browse to the skin folder and look for the file "ViewsVideoLibrary.xml"
in there I find the following:
<include name="PosterWrapView">
<control type="grouplist">
<visible>Control.IsVisible(501)</visible>
So posterwrap is ID 501.
and
<include name="PosterWrapView2_Fanart">
<control type="group">
<posx>0</posx>
<posy>350</posy>
<visible>Control.IsVisible(508) + [[ListItem.IsFolder + Container.Content(Movies)]
etc.
note that not all IDs will make sense depending on what you are viewing (movies, tv, music, music videos, etc)