Let's take this one step at a time. Your speech needs to be persuasive - you are going to need to take a stand that one of Shakespeare's plays is or is not relevant to the experiences of modern audiences, and you are going to use your speech to try to convince your audience that your stand is correct. Your speech needs to be multi-modal - it will need to combine several methods of presentation, meaning you might use PowerPoint slides or recorded music or other media to support and illustrate the points you make in your speech.
Start your speech by identifying the Shakespeare play you will be discussing and explaining your basic conclusion - whether you feel it is relevant and why or why not. In the body of your speech, present the reasons that support your conclusion and use your other media to help illustrate your explanations. End your speech with a review and summary of your arguments and your reason for your opinion. Good luck!