When I set up my jabber.org account in Chatsecure it doesn't connect. Another account on jabber.ccc.de works.
Gtalk 1.3 doesn't support multiple accounts: it just connects with the main one, with no apparent way to switch it. Upgrading to hangouts technically works, but it doesn't even bother to display user ...
I have searched quite a bit but still javen't manged to find a general Jabber client that supports video calling. There are a few that support sending video files though.