Version: 2018.2
public bool isPlaying ;

Description

Возвращает, если камера в данный момент проигрывается

using UnityEngine;

public class Example : MonoBehaviour { // Tries to start the camera and outputs to the console if is was sucessful or not. void Start() { WebCamTexture webcamTexture = new WebCamTexture(); webcamTexture.Play(); Debug.Log(webcamTexture.isPlaying); } }