Hi Kerthana, I could not load the video file, but achieved to load the file. In order to reproduce the behavior, please add visibility feature (as shown below), the menu item first disappears when the button is clicked, when you down in any other menu, and go back, visibility is reset to True (by itself)
private void buttonAdv1_Click(object sender, EventArgs e)
{
this.treeMenuItem3.Enabled = true;
this.treeMenuItem3.Visible = true;
}
private void buttonAdv2_Click(object sender, EventArgs e)
{
this.treeMenuItem3.Enabled = false;
this.treeMenuItem3.Visible = false;
}