JQuery

To begin with, I am a noob at webdesign, just so you know.

What I want to do is that I want to use jquery to:
1. When you click on a button a video shows in the middle of the screen linked from Youtube (this works fine).
2. Next to this button a want to have another button which shows information in a small box when you click on it.

How can I have both of theese things on the same page? When I add another script into the headtag, the video jquery thing stops working.

Jquery show/hide.
You can have as many on the page as you want.
If its broken, its your implementation thats wrong.
And a tut doesnt help. A live link would.

I was hoping you all would be so kind and help layout some steps for me in a little project I am undertaking.

Basically I want a secretary to be able to upload a file (pdf document) after that file is uploaded I want it to automatically create a link to the file on our website. This will be used to make my job easier as I won’t have to go in and add HTML code every week when a new board meeting agenda is published along with the minutes.

Could you guys please offer me some advice on how to go about this? It would be a great help. Thank you!