https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=UCMfbfh6f61rI2-PVlxdsxGQ&maxResults=25&key={API_KEY}

public class ChannelActivity extends AppCompatActivity {
ListView lvVideo;
ArrayList<VideoDetails> videoDetailsArrayList;
CustomListAdapter customListAdapter;
String searchName;
String TAG="ChannelActivity";
String URL="https://www.googleapis.com/youtube/v3/search?part=snippet&channelId=UCMfbfh6f61rI2-PVlxdsxGQ&maxResults=25&key={API_KEY}";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_channel);
    lvVideo=(ListView)findViewById(R.id.videoList);
    videoDetailsArrayList=new ArrayList<>();
    customListAdapter=new CustomListAdapter(ChannelActivity.this,videoDetailsArrayList);
    showVideo();

}

private void showVideo() {
    RequestQueue requestQueue= Volley.newRequestQueue(getApplicationContext());
    StringRequest stringRequest=new StringRequest(Request.Method.GET, URL, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject jsonObject=new JSONObject(response);
                JSONArray jsonArray=jsonObject.getJSONArray("items");
                for(int i=0;i<jsonArray.length();i++){
                    JSONObject jsonObject1 = jsonArray.getJSONObject(i);
                    JSONObject jsonVideoId=jsonObject1.getJSONObject("id");
                    JSONObject jsonsnippet= jsonObject1.getJSONObject("snippet");
                    JSONObject jsonObjectdefault = jsonsnippet.getJSONObject("thumbnails").getJSONObject("medium");
                    VideoDetails videoDetails=new VideoDetails();

                    String videoid=jsonVideoId.getString("videoId");

                    Log.e(TAG," New Video Id" +videoid);
                    videoDetails.setURL(jsonObjectdefault.getString("url"));
                    videoDetails.setVideoName(jsonsnippet.getString("title"));
                    //videoDetails.setVideoDesc(jsonsnippet.getString("description"));
                    videoDetails.setVideoDate(jsonsnippet.getString("publishedAt"));
                    videoDetails.setVideoId(videoid);

                    videoDetailsArrayList.add(videoDetails);
                }
                lvVideo.setAdapter(customListAdapter);
                customListAdapter.notifyDataSetChanged();
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            error.printStackTrace();
        }
    });
    int socketTimeout = 30000;
    RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
    stringRequest.setRetryPolicy(policy);
    requestQueue.add(stringRequest);

}