Snaparazzi/Assets/Scripts/CameraManager.cs

using UnityEngine;
using UnityEngine.UI;

public class CameraManager : MonoBehaviour
{
    public WebCamTexture webCamTexture;

    // Start is called before the first frame update
    void Start()
    {
        WebCamDevice[] devices = WebCamTexture.devices;
        webCamTexture = new WebCamTexture(devices[0].name);
        webCamTexture.Play();
    }

    // Update is called once per frame
    void Update()
    {
        gameObject.GetComponent<RawImage>().texture = webCamTexture;
        gameObject.GetComponent<RawImage>().material.mainTexture = webCamTexture;
    }
}