<FrameLayout
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="#000"
    android:visibility="gone"

private View mCustomView;

FrameLayout frameLayout = findViewById(R.id.container);
 webView.setWebChromeClient(new WebChromeClient(){


                    @Override
                    public void onShowCustomView(View view, CustomViewCallback callback) {
                        super.onShowCustomView(view, callback);
                        if (mCustomView != null) {
                            callback.onCustomViewHidden();
                            return;
                        }
                        mCustomView = view;
                        webView.setVisibility(View.GONE);
                        frameLayout.setVisibility(View.VISIBLE);

                        frameLayout.addView(view);
                        mCustomViewCallback = callback;
                    }

                    @Override
                    public void onHideCustomView() {
                        super.onHideCustomView();
                        if (mCustomView == null)
                            return;

                        webView.setVisibility(View.VISIBLE);
                        frameLayout.setVisibility(View.GONE);
                        mCustomView.setVisibility(View.GONE);
                        frameLayout.removeView(mCustomView);
                        mCustomViewCallback.onCustomViewHidden();

                        mCustomView = null;

                    }

                });