iChat doesn't run through AOL, it connects to AOL's servers. Adium also can connect to AOL's servers. They are two different apps and only one can be logged in to the server at a time as far as I know, and Adium doesn't support video. If you want to use video with AOL IM, iChat is it.
I'm no expert in IM'ing, so perhaps you might get more direction if you re-post your question in the iChat forum or go to Adium's site and check their forums.
Hope this answers your question! (even though it may not be what you were hoping for 🙂