how to compress the video file and stored in db using asp.net c#?

using (BinaryReader br = new BinaryReader(FileUpload1.PostedFile.InputStream))
        {
            byte[] bytes = br.ReadBytes((int)FileUpload1.PostedFile.InputStream.Length);
            string strConnString = 'give the connection string';
            using (SqlConnection con = new SqlConnection(strConnString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    cmd.CommandText = "insert into tblFiles(Name, ContentType, Data) values (@Name, @ContentType, @Data)";
                    cmd.Parameters.AddWithValue("@Name", Path.GetFileName(FileUpload1.PostedFile.FileName));
                    cmd.Parameters.AddWithValue("@ContentType", "video/mp4");
                    cmd.Parameters.AddWithValue("@Data", bytes);
                    cmd.Connection = con;
                    con.Open();
                    cmd.ExecuteNonQuery();
                    con.Close();
                }
            }
        }