.net视频代码问题，急急急！

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using vsou.App_Code.T_FoodTableAdapters;

namespace vsou
{
    public partial class shipinPlay : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!IsPostBack)
            {
                T_PlayTableAdapter adapter = new T_PlayTableAdapter();
                int id = int.Parse(Request["id"].ToString());
                var data = adapter.GetDataByplay_id(id);
                var user = data.Single();
                Session["URL"] = user.play_url.ToString();
                LabelName.Text = user.play_name;
                LabelTell.Text = user.play_tell.ToString();
                LabelEmail.Text = user.play_email;
                LabelBus.Text = user.play_bus;
                LabelIntro.Text = user.play_intro;
                LabelContact.Text = user.play_contact;
                LabelAddress.Text = user.play_province + user.play_city + user.play_region + user.play_address;
                Title = "vsou-" + user.play_type1.ToString();
                this.littext.Text = getPlayer("div1", "../" + user.play_picture.ToString(), "../" + user.play_mv.ToString());
            }
        }

        public string getPlayer(string playerId, string image, string mediaplayer)
        {
            string player = "";
            player += string.Format("<div id=\"{0}\">Loading the player ...</div>  ", playerId);
            player += "<script type=\"text/javascript\">";
            player += " jwplayer(\"" + playerId + "\").setup({  ";
            player += " skin: \"glow.zip\",";
            player += " stretching: \"fill\",";
            player += " flashplayer: \"player.swf\",";
            player += " image: \"" + image + "\",";
            player += " width: 470,";
            player += " height: 460,";
            player += " levels: [";
            player += " { file: \"" + mediaplayer + "\" },";
            player += " { file: \"bkaovAYt-1287469.webm\" }";
            player += " ]  });  </script>";
            return player;
        }
    }
}
能看懂上面代码的前辈们，帮我解释下吧，做的网站是视频网站，我还想知道如果想让视频在网页上播放能有几种办法？有种方法是加入插件，那又是怎么回事？我一点概念都没有，会的给点思路吧！谢谢了

补充：.NET技术 ,  ASP.NET