All buttons from RadMediaPlayer don't have default tooltips.
So I'd like to know please how set the tooltip value in the "List Button". Also, I'd like to set a tooltip in the "Full Screen Button".
In order to set the property ToolTip of the Button in the RadMediaPlayer you have to make a custom theme of the control in Blend.
Please find attached a project with a custom theme of the RadMediaPlayer and setting the ToolTip property of the following buttons (FullScreen , PlayList).
If you have further questions please do not hesitate to ask us.
I hope this will help you.
Best wishes,
Dimitrina
the Telerik team
Browse the videos here>> to help you get started with RadControls for Silverlight