Take a long look at
http://www.flashapi.org/[
^], this excellent actionscript library by Pascal ECHEMANN-MOLINENGO should enable you to create the required functionality using Adobe's Free/open source Flex SDK.
FlashDevelop[
^] is a nice free IDE for Flex.
It isn't an asp.net control, but flash or silverlight will probably get you there faster than asp.net and javascript.
Kassons "Hope
Slide Videos[
^] will help you." is certainly one approach, but IMHO using flash or silverlight gives you far more functionality when designing an interactive multimedia solution.
Regards
Espen Harlinn