Getting Values on a Control within Datagrid

[nduduzo]

Guys, i want to obtain a label value that is within a datagrid; please have a look at the code bellow, and it gives me an NullRefException"Object reference not set to an instance of an object.":

Dim title As String=(DirectCast(VideoDetailsView.FindControl("lblTitle"), Label).Text())

here is my, Data calling and asp.net code
(Data calling: VB.net)

Public Sub GetVideoDetails()
        Dim VideoSql As String = "SELECT * FROM VideoList WHERE CategoryID= 5"
        Dim ocmd As New OleDbCommand(VideoSql, CreateOleDbConnection)
        Dim ds As New DataSet()
        Dim ad As New OleDbDataAdapter(ocmd)
        ad.Fill(ds)
        ds.Dispose()
        If Not IsPostBack Then
            VideoDetailsView.DataSource = ds.Tables(0)
            VideoDetailsView.DataBind()
        End If
        ocmd.Dispose()
        CreateOleDbConnection.Close()
    End Sub

(ASP.net code)
Please Note: This Label is within DataGrid

<asp:label ID="lblTitle" runat="server"style="font-family: Arial, Helvetica, sans-serif; font-size: small; font-weight: 700; color: #0066ff;" text='<%# DataBinder.Eval(Container.DataItem, "Tittle")%>' />