Remember I can't see exactly what you have already done.
First step is go to manage domains in the panel. See if the domain is listed there.
If it is, then what 'user' is listed in the web host column? Is that the same user that you are using to log in via ftp?
Dreamhost "robot" creates a Folder for you when you add the domain as hosted in the panel. If both
dougvanderhoof.com and StudioVisitVideo.com have the same "user" listed on the panel's manage domains page then when you log into that "user" via ftp you should see two folders one called dougvanderhoof.com and the other StudioVisitVideo.com and you put the files for each of your sites into their respective folders.
If you have set StudioVisitVideo.com up under a differnt user then you will need to log in there to find the "robot" created folder named StudioVisitVideo.com