Beside being expert in the field about which they are going to make video, what are other qualifications needed to become a youtuber. Moreover, what do you think can make you stand out from others?
I don't think you are required to be an expert in your area of interest. All you need to become a YouTuber: a camera (can be your phone camera), a tripod, video editor, a good source light, internet, a phone/laptop and a youtube account.
To stand out, you probably need to be really good/talented in your area of interest. Your video/audio quality has to be ok