I have a LaunchPoint service installed in Marketo, which connects to BrightTALK. Some leads have since registered on the BrightTALK side, but I don't know where to find them in Marketo. I tried searching "All Leads" for a very unique name which posted to BrightTALK two days ago, but nothing was found in Marketo. Additionally, in Marketo there is this mysterious column labelled "Used by" (in the LaunchPoint settings page in Marketo) which currently indicates zero.
You should ask BrightTalk to provide you with instructions.
The column Used By means that X Programs are connected to BrightTalk. You should create an Event Program>Webinar and then connect it to BrightTalk from the Program Summary page.