BigBlueButton is built around teaching, so a standard meeting demo is not enough. Run a short lesson with an instructor, a few learners, and one participant on a weak connection. Use the presentation, whiteboard, poll, breakout room, and recording features you rely on.
Observe how easily the instructor can regain attention, whether breakout work returns to the main session, and what learners can access afterward. Also test LMS integration, accessibility with keyboard and captions, moderation, and data retention. Compare the complete teaching workflow and hosting burden, not just the maximum participant count or video quality on a fast office network.