The final due diligence you need to go through before an interview is putting all this together. And you spent some time coming up with messages coming up with sound bites. My recommendation is find a colleague, friend, family member to ask you questions. It doesn't really matter how good their questions are, no one's being judged on the quality of the questions you're being judged on the quality of the answers. The first time you do it, maybe practice as if it were a phone interview, stare richer notes, stare at your sound bites, but then try to get more comfortable with it. Do the next one as a TV interview, meaning you don't get to look at your notes.
Then really analyze your answers. You want to get to the point where no matter where you stop the video, if you ask yourself if only the last five 710 seconds gets on the evening news, or gets in the most prestigious newspaper in your country, on the front page. Are you happy with it, you can get to the point where every single sentence in your whole interview, withstands that scrutiny. You are in good shape. You are ready for that interview, you've been media trained, and you now have the skills you need to really communicate. So that's what I'd recommend.
Most people don't like to rehearse on video, there's always an excuse, oh, there's no time lies. There's always time for anything that's important. If it's important for you to really do a great job on your next interview. Then there is time for you to do a practice a rehearsal on video, not in the mirror, not thinking to yourself but talking out loud, practicing on video again and again, until you love what you see every inch of it. Do that and you'll be in great shape.