When applying for a job it’s important to research about the company culture, what they do and how the work, and then think of ways in which you could be beneficial to the company. A great resource for your research would be there website.
Fidgeting is a big NO, if you tend to fidget when you’re nervous or under pressure use your hands to express yourself whilst talking. By avoiding this you will appear more relaxed and confident. Think of an interview as selling a product, you have to convince them that YOU are indeed the best person for the job.