Many people choose to run the other way because it is scary. Recording a video (and worse still, playing it back to watch yourself) isn't always an experience that people look forward to trying. I promise you that it's usually not that bad, and sometimes it can be a huge confidence booster.
I started to do YouTube videos a couple of years ago with much reluctance. To be honest, I was terrified. I wasn't exactly excited about watching myself talking on video. It reminded me of those days of public speaking in high school that made me want to hide under my desk. I did recognize that it was important to my overall goal. I gave it a shot. I now have over 200 videos on my channel.
The beauty of recording a video is that you don't have to post it. You can take the time to get comfortable with speaking to a camera. You must adequately explain your topic (notes help), and of course, you have to stop finding fault with your appearance. These are probably the three things that make most people hesitant. We live in such an overproduced world when it comes to 'reality' television and even YouTube videos that we often forget that we don't have to look, sound, or be perfect to record a video. If you sound, look and seem too perfect, it might make you slightly less relatable to your audience.
Of course, you should make some effort. Don't roll out of bed, not comb your hair, and ramble on for 20 minutes without making a point either. Show your best side. Fix your hair. Throw on some makeup if you're into it. Tidy up the space you'll be recording your video. Find some decent lighting (I don't always do this). Tell everyone in the house to not make any noise because the camera catches everything.
So why did I start doing YouTube videos? I wanted my audience and potential audience to learn about me. I didn't want to be the anonymous face behind the books or the mysterious author that no one knows. I wanted people to learn about me, why I was writing about the topics I chose, explain my books to people who wanted to get more of a sense of what they were about, and answer some of my most asked questions from new authors or people interested in my writing.
Most important of all, I believe that YouTube videos are about connection. It was important for me to connect with people, especially those interested in my writing. I don't do videos because I want to be an internet star or gain followers. I have them available as another option for readers to learn about me, my books, and my thoughts as a writer. The beauty of YouTube is that you never know who is watching.