FaceTime is great if all the users have Apple products.
But if you have to communicate with Windows or Android users, that might change the requirements.
If you FaceTime is not available to all the people you need to video chat with, then start a new question, as only 2 people have r responded to this thread, with a total of 51 view (low). A new question, this time stating your requirements for all the users you will be video chatting might get you are another answer.
I personally only know about FaceTime and Zoom. I know Apple's privacy policy. I also think Zoom only offers end-to-end encryption for paying users, not the free version. I know there are other services, but I do not know their privacy policies, except I would not trust FaceBook under any circumstances, nor any FaceBook owned company (like WhatsApp or FaceBook messenger). Google might also be questionable, but not always. Amazon, also not so much, but if you are looking at it, check their privacy policy. Skype is Microsoft, and it used to be secure, but I'm not sure now.
Here is a 10 best website, which can give you an idea of what is available
https://www.tomsguide.com/best-picks/best-video-chat-apps
