I can't answer the multimedia question, I never go there.
Rep isn't worth anything. If someone likes your post they might give you rep. If they think what you said was idiotic they might take some away. If you ask for it in your post some may give it to you, I on the other hand find asking for it pathetic and may take some away. But like I said it has no value like points do. it's just something some people get into and others don't. The little rep I have is because people have liked what i had to say. I appreciate the time for repping me more than the rep itself.