why video will blurred when i played it with libvlcsharp on c#?

as you see quality decreased when i play video with libvlcsharp nuget_package in c#

I tried to searching on google, but i didn't find any answer

see this image and check difference between left and right side in quality

player.SetMedia(new System.IO.FileInfo(@"C:\Users\vahid soufi\Desktop\a (1).mp4"));player.Play();