The homepage of the LiveWebinar looks ordinary because of it’s color and UI but as I dive deeper and looked into the mentioned features and other aspects, it definitely appears as one of the most powerful and advanced Webinar platforms I have ever seen.
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Many don't know that LiveWebinar was previousely called HTML5meeting. It has also raised a total of €130K in funding over 1 round in Oct 2016. Later they rebranded it as LiveWebinar. Well, it's good that you changed the name. HTML5meeting seems weird as brand name. :)

Unlike many other webinar tools in the market, it DOES work. It has the solid backbone with useful features but at the user’s end, it needs some design-revamp and proper user-onboarding features-tour layers to guide new users.

Few feedback -

1. Many sumolings have Slidebean lifetime plan ( or Ludus.one) , any plan to integrate with them ( along with Prezi )

2. It would be awesome if you can allow Custom Domain feature with 5 stacked agency deal.

3. Would love to see more integration requests for SaaS that have been previously featured in the form of lifetime deals like Convertful, Gist, Moosend, Sendfox, etc.

4. Kindly work beautifying your user interface ( read UI & UX ). You have a solid backbone.. make us love your design too. :)

5. Kindly share the public roadmap link about what's coming soon.

Looking forward to using it more. Thanks.