which plan to choose and buy

Hello, ​@crystalgausa! Great to have you here in the Zoom community. Welcome!

If you're planning to stream a Zoom meeting to a Facebook group, the main consideration isn't whether you choose Pro or Business. The key requirement is that you'll be using Custom Live Streaming Service, and you must be an admin of the Facebook Group to stream to it.

If you're a single host and mainly need longer meetings with live streaming, Zoom Pro is usually the best place to start. Zoom Business is a better fit if you need multiple licensed hosts, centralized admin controls, or company branding or you're managing a team.

Based on what you've shared, Zoom Pro sounds like the right choice. If your needs change in the future, you can always upgrade your plan.

You can also check out Zoom Plans & Pricing to compare the available plans and features. For step-by-step instructions on setting up Facebook live streaming, see Live streaming meetings or webinars on Facebook.