Why are people floating around?

Video windows moving around is because the system detects who is speaking. To solve that, click the lock icon in the bottom right of a window.

Why do we lose video sometimes but still have audio?

Video quality dynamically adjusts based on the strength of a user's network connectivity. This is done by the participants's computer sending feedback that say "My network quality is at 'x' level." The faster and more stable a participant's broadband connection is, the better the video quality it will request. If the participant quality drops below a certain amount, it will result in falling back to audio only to preserve the continuity of the session. Broadband connectivity is the limiting factor. If participant.

Further troubleshooting?

See this article: Common Video Connection Issues

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