Time-controlled Joomla 1.6/1.7 Module or Plugin

Hi there, i need a Joomla Module which must be a derivative of the "Custom HTML" Module or a Plugin which has the following feature: I must be able to set 5 diffrent time intervals which, when lapsed and/or activated open new content. Following a short example: I have one content item on which a video is played. The Video runs 20 Minutes. After 20 Minutes a part of before hidden content is revealed. This revealed content may be a button. After the button is clicked a new timer starts. Structure of a content item with the Time-controlled Joomla 1.6/1.7 Module or Plugin: This is a Title Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Video (runs 20 Minutes) hidden button, which appears after 20 Minutes. Plugin could look like this {timecontrol=[20]}Here is the content, in this case an image with a link{/} Another hidden content which opens after the button is clicked. Video (runs 5 Minutes) {timecontrol=[5]}Here is the content, in this case an image with a link{/} and so on if you have any questions please ask. If you have another solution besides a module/plugin which i could incorporate into a Joomla site dont hesitate to bid on this project and tell how you would do it...