The OP wasn't proposing that it be added to mIRC, and I suggested adding it to DCC, not IRC.
We have DCC specifically to allow for direct connection adoptions such as this, so why not use it?
See:
http://www.irchelp.org/irchelp/rfc/dccspec.htmlWhilst it dosn't specify video or audio, it's the concept of DCC i'm referring to