missing plugin error when playing video!

hello
i'm trying to display videos in the gridview ,so far when i press play the grid widens and shows "Missing plugin" what should i do?
the videos are retrieved from the database
this is the code

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            BackColor="#CCCCCC" BorderColor="#999999" BorderStyle="Solid" BorderWidth="3px" 
            CellPadding="4" CellSpacing="2" ForeColor="Black" Width="292px" 
            onselectedindexchanged="GridView1_SelectedIndexChanged" 
            onrowcancelingedit="GridView1_RowCancelingEdit" 
            onrowediting="GridView1_RowEditing" onrowcommand="GridView1_RowCommand" 
            >
            <RowStyle BackColor="White" />
            <Columns>
                <asp:TemplateField HeaderText="video">
                  <ItemTemplate>
              <asp:Label  ID ="v1" runat="server" text='<%#bind("video") %>'></asp:Label>   
              </ItemTemplate> 
              <EditItemTemplate >
              <embed width="320" height="240"  src='<%#Eval("video") %>'>
               </embed>
               </EditItemTemplate>
                </asp:TemplateField>
                    
                <asp:TemplateField HeaderText="play">
                <ItemTemplate>
                <asp:LinkButton  ID ="lnk" runat="server" Text="play" CommandName="edit" >
                </asp:LinkButton>
                </ItemTemplate>  
                 </asp:TemplateField>
                
            </Columns>

can anyone suggest any method?