What is the least expensive ?

Question

What is the least expensive way to video & audio record a meeting and playback using streaming on the internet

Answer 1

You have not provided enough detail.

What kind of video quality?

What kind of audio quality?

What sort of environment will the meeting be held?

How long is the meeting?

Are multiple cameras required? How many meeting attendees?

Will there be presentation material from the meeting that needs to be in the video?

Most likely the most cost effective way will be to hire someone - perhaps a video production service local to you. There are also some wedding videographers that will do events other than weddings.