How do I trigger a method to run after x seconds?

I am working on a C# Windows Forms application where I need the method to pause for 30 seconds until it continues on to the next line of code. I have tried Thread.Sleep() which wasn't suitable for this application and I've understood that I should use some sort of timer instead. I have searched a lot but I can't figure out how to implement timers.

My code is below and could anyone show me how I should implement the timer. I have made a comment on where I want the method to pause.

private void start_Vid_Click(object sender, EventArgs e)
{
    if (video.State != StateFlags.Running)
    {
        viewport.Visible = true;
        video.Play();
    }

    //Here I want to wait 30 seconds until the next line of code is triggered

    viewport.Visible = false;
    viewport2.Visible = true;
    pictureBox1.Visible = true;
    start_Webc(); 
    video2.Play();
}