I just wanted to chime in with a fairly standard CB answer that I am surprised wasn't given yet. When designing a show, the most important thing is that the ideas are your own. You should NEVER go rent the video of a show or surf YouTube as research for your design. It is one thing if you have seen a show, but seeing a show for research for our own production really is not a good way to design. It usually leads to designers copying what they have seen (or trying to) as opposed to coming up with original ideas.
All this is not to mention the fact that posting any footage of a show on sites like YouTube without the express permission of the licensing company, cast, designers and producer is illegal, even for high school shows.
When you are designing shows you should start with how you react to the show. With a musical, you should read the script and listen to the music and think about how it makes you feel, your emotional reactions. Then take yourself over to the library and find the section with photo and art books. Sit and look through the books and find images that evoke the same emotions. Think about why the images evoke those emotions, is it the colors, the texture, the angles of light? Whatever it is, take that and try to recreate the
effect on
stage.
Now you need to make sure that your ideas are in
line with the other artistic staff. Ensure that your concepts fit with the director's and the other design elements. Once you get to this
point it is a lot easier to offer help. When you come in and ask "How should I light XYZ show?" it takes the design away from you. While I am sure that many member of CB would have great ideas, you need to make the show your own. One of the very important parts of design is being able to justify your choices, so if you pick some
template because someone said it was good, you have to be able to justify it for yourself, otherwise, what happens when a teacher or critic, or anyone asks "Why did you make that choice?" If all you can say is "someone recommended it for this show" that doesn't show any creativity. Same goes for if you were to design a show/scene based on photos or video of another show. Doing something just because "that is how they did it on Broadway (or some other
theatre)" is not a good reason to make the same choices.
So, I urge you to come up with your own ideas, and then come back and ask how to implement them. Make the design yours, and have fun!