Could you please clear one thing? I want to do website to website video calling without downloading Zoom on Desktop or Mobile devices but can I invite a particular person at the time of direct calling without downloading Zoom?
Thank you for reaching out to the Zoom Developer Forum. If you allow guests to join the meeting, they can join without having a Zoom account. Otherwise, the best option is to redirect them to the Zoom website so that they can create an account.
I hope that helps! Let me know if you have any questions.