Hi tati258,
We appreciate you reaching out to us.
We’d like to gather additional details that may help us be in a better position to assist you.
Are you experiencing the issue with multiple contacts?
Have you had the chance to make sure that your device storage is not extremely low?
If you answer yes to both questions, please test your camera by taking a video.
If possible, you can also test out the camera by using a different video calling app.
If you are unable to shoot a video or the issue persists on a different app, you may have to have the device inspected by a technician.
You can explore your service options here: Get Support
If the issue is isolated to FaceTime, please use a fast and stable network as mentioned in the article below.
If you can't make or receive a FaceTime call on your iPhone or iPad - Apple Support
Let us know if the issue persists on a known-good Wi-Fi network.
Take care!