Is it dumb or weird to maybe plan out what you'll say as a youtuber?

Having a script to refer to is important, as it keeps the content of your video interesting and organized. If you have no idea what you want to say, your video may appear chaotic and extremely random, which might discourage viewers from listening to you. Having a message or theme - even if it's silly - can help you choose the right information to include. Focusing on a certain topic and perhaps stating your stance (if appropriate) is a good way to keep your video organized.