How to resolve the issue of uploading the video on youtube ?

Question

Hi all,

I am facing the problem of uploading the video on you tube , when i upload the video of .5 MB , it is successfully uploaded, when i try to upload the video of 10 MB then i am facing the problem of uploading the video on you tube 

code is given below:-

public string UploadVideo(string FilePath, string Title, string Description)

    {

        Video createdVideo = null;

        try

        {

            settings = new YouTubeRequestSettings("Lakshya", devkey, username, password);

            request = new YouTubeRequest(settings);

            Video newVideo = new Video();

            newVideo.Title = Title;

            newVideo.Tags.Add(new MediaCategory("Comedy", YouTubeNameTable.CategorySchema));

            newVideo.Description = Description;

            newVideo.Private = false;

            newVideo.YouTubeEntry.Private = false;

            newVideo.YouTubeEntry.MediaSource = new MediaFileSource(FilePath, "video/mp4");

            createdVideo = request.Upload(newVideo);

            

            

        }

        catch (Exception ex)

        {

            Response.Write(ex.ToString());

        }

        return createdVideo.VideoId;

     }

Error:- "Object reference not set to an instance of an object"... I don't know what should i do in that case. small video is successfully uploaded while for 10MB video i got the error...:(