i have been trying to add videos to my website as well as a slide show...but the problem is i don't know how to do so..
so can anyone help me please....
thanks...

The easiest way is to upload to Youtube and copy their code into your site....

you can convert video to flv using any free flv converter and upload it to your site.

Then, you can embed that in your web page.
search for 'video embed code' in google.