PoodLL can do some things cross over into video conferencing territory, but it depends really what you want to do. PoodLL works by adding a filter to the html area, and it then shows within the host page. So a little like block, you can enable it within assignments and other places.
But it is not full on video conferencing, you can show and broadcast video streams, or do video "pairwork".
Perhaps explain a little more what you want to do.