Using the Creative Commons search, find one image, one text file (about a paragraph), and one video clip.
Place the files onto your web page, giving proper attribution. Then write a few sentences explaining the license terms.
To copy the files--
Text: This is the easy one: simply cut and paste
Photo: You can include the photo by linking to the original, or by copying the original. You should copy it, not simply link to it.
In your web editor, when you try to add an image (or video clip), you'll get a dialog asking for the location of the file. If you include a full URL (http://), you are linking to the original. If the original site ever changes, your image won't show up.
Instead, you should copy the image to your public_html folder, and make a link to the local file, using the "Choose File" button. Check the "URL is relative" box. Then upload the file and the html page to your web site.
Video: This one's tricky; you'll need to use the <embed> tag, which isn't included in NVu. But many video sites will often have the <embed> code ready to copy and paste.
http://revver.com/video/1075056/walking-the-dog/
Choose the format you want, and copy the code.
In NVu, go to the Source tab, and paste the code between the <body> and </body> tags
YouTube is probably easiest, but the copyright situation is precarious.
See http://www.youtube.com/t/howto_copyright