Plug in for video conference in openfire

Hi all IT guys,

I am a newbie with openfire and i am looking for a lan instant message for my company. Any body have experience in openfire please help me with the question below

About video call between 1 people to 1 people. Which plugin should i use?

About video conference with many people in a goup for meeting. Which plugin should i use?

Thank you very much for your help