Flash Plugin Question

Where does the bandwidth come from?

[woop01]

A client that we do a website for has contracted a live broadcast for an upcoming event. The company they have it contracted with provides the following code to embed live events on other sites...

<object width='800' height='600'>
<param name='movie' value='THEIRSITEURL'></param>
<embed src='THEIRSITEURL'width='800' height='600' type='application/x-shockwave-flash'pluginspage='http://www.macromedia.com/go/getflashplayer' />
</object>

Would that use the bandwidth from "THEIRSITEURL" or would it use the bandwidth on my client's site? I always thought it was like hotlinking an image and only used bandwidth on the originating server, not the server where the object is embedded.