Out of memory Exception in xamarin.ios

I want to play video on spalsh screen in xamarin.ios. but i searched a lot then i found we can't play video on splash screen.so i used a blank screen on splash screen in xamarin.ios and create a common view and used a plugin videoview and play video on this page. Now i want to go my next page after playing the video.but a error is coming Out of memory.My code is:

<?xml version="1.0" encoding="UTF-8"?>

<forms:VideoView HorizontalOptions="FillAndExpand" Source="https://aimonlinestorage.blob.core.windows.net/profilepicture/DesignPages.mp4"
VerticalOptions="FillAndExpand" x:Name="videoView"/>

and code behind page is:

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Windows.Input;
using Plugin.MediaManager;
using Prism.Commands;
using Prism.Navigation;
using Xamarin.Forms;

namespace SAC.MobileApp.Views
{
public partial class VideoSplash : ContentPage
{

    private readonly INavigationService _navigationService;



    private async Task Navigate(string name)
    {
       // await Task.Delay(20000);

      //  await this.navigationService.NavigateAsync(name);
    }


    public ICommand OutputAgeCommand { get; private set; }

    public VideoSplash()
    {
        InitializeComponent();

          Xamarin.Forms.NavigationPage.SetHasNavigationBar(this, false);
       // videoView.Source = "https://aimonlinestorage.blob.core.windows.net/profilepicture/DesignPages.mp4";

        DelayedNaviagition();
    }

    private async void DelayedNaviagition()
    {
        try
        {
            await Task.Delay(20000);

            // this.navigationService.NavigateAsync(name, animated: false);
        //    await this.navigationService.NavigateAsync("MainPage", animated: false);
            await  _navigationService.NavigateAsync("NavigationPage/MainPage", null, useModalNavigation: true, animated: false);
        }

        catch(Exception ex)
        {

        }



    }
}

}

Now exception is coming out of memory.and Navigation is not working after video playing...if anyone has any solution for it please suggest me..