what are the picture and video? it its a lolcat and a rickroll I'll abstain from helping.
Copy the embed code from YouTube (or similar) for video.
Example result:
Use an img tag for pictures (look up the syantax: http://www.w3schools.com/html/html_images.asp)
Example result:
see sizing is important, lest you make your thread an eyesore.
type (without the outside quotes) inside these brackets >:
IMG SRC="the link"
I can't type is exactly; the page will try to display "the link" and makes it all blank.
<img src="the link">
< gives < > gives >, they stand for "less than" and "greater than"
edit: also, if you're going to make img tags do Brian a favour and keep them w3c-compliant by closing the img tag like so:
<img src="the link" /> - note the /
I am going to try to do what you just did to see if I really understand this.
<img src="the link"/>
Edit: Cool!!!!