Okay 1st of all sorry if some people will think this is a duplicated post but here for the people who doesn't read the 1st replys:
1: You can put the Chatbox on the bottom of the streaming video from the settings.
2: Use Google Chrome Dual View to split the tab into 2 its easier then your way.
3: Use FireFox Splitter *addons* to split the tab into 2 or more.
(Since I only use Google Chrome and not FF I couldn't have a picture of this, if any mod who can edit this to add his own FF splitter picture its okay for me)
*This was from another thread that was posted at 12-26-2010 in the General Discussion section under the name Chat in CB and Stream at the same Time?!.*
this is why I thought this thread is kinda duplicated or have the same thought as that thread