Demio webinars are 100% real-time. There is virtually zero latency between you (the presenter) and your attendees. We believe this is the only way to do live streaming, as it allows for real-time interaction with your audience, giving everyone the best experience possible.
We also run on our own streaming engine, and don't rely on YouTube streaming with insane 30 second delays. We find that such a large delay would degrade the quality of both the platform and the presentation for everyone involved. We think you deserve the best :)