White frame before video plays in Unity instead of a custom thumbnail

I load a thumbnail before the video starts to play, but later when the video is playing, there is first a white frame and then the video is playing. How can I avoid this white frame??

Here is my code-

video.GetComponent<RawImage>().texture = thumbnailTex;
//Play the video:
RenderTexture rt = new RenderTexture(1920, 1080, 16, RenderTextureFormat.ARGB32);
rt.Create();
video.GetComponent<RawImage>().texture =rt;
video.GetComponent<RawImage>().targetTexture=rt;
video.GetComponent<VideoPlayer>().url = "www....";
video.GetComponent<VideoPlayer>().Play();
// white frame, and then the video is playing

You need to wait first and test if the video is ready to play

It would be better if it's not already to have the above code in a coroutine. What is happening is you call play before the player has had a chance to download/load the first frame. Then display your rendertexture.

video.GetComponent().url = "...";
    video.GetComponent().Prepare(); 
    while (!video.GetComponent().isPrepared) 
        yield return new WaitForEndOfFrame(); 
    video.GetComponent().frame = 0; //just incase it's not at the first frame
    video.GetComponent().Play();
    //now display your render texture