Thank you for posting in the Zoom Developer Forum ! Currently, there is no User’s Camera Status Updated API or Webhook event. However, we do have participant joins and or is admitted to meeting events you can consider. See the below forum post for more details:
Additionally, based on your use case, it seems Webbooks would be more aligned with what you are looking to achieve. The links below provides a overview of the available Zoom meeting Webhooks and how to get started with Webhooks. Take a look and let us know if you have any questions or comments:
Zoom API Events - Meeting
https://marketplace.zoom.us/docs/api-reference/zoom-api/events/#tag/meeting
Using webhooks
https://marketplace.zoom.us/docs/api-reference/webhook-reference/
If this above does not work, I’d recommend submitting your use case as a feature request. Here is the link where you can submit feedback : Sending feedback to Zoom - Zoom Support
Happy to continue discussing available options for your use case as well. If interested, please kindly share more details about your use case and what you are looking to accomplish. Sharing more information about your use case will help us provide more personalized support.