Let's break this down into three different types of business, and their relationship with video.
1. The first one is where video forms the core content of your business. For example, if you're a course creator, a digital service provider, or a coach. Video is the most effective way of delivering tutorials. For people making courses, and other business where the video is part of the product, this course is essential.
2. Where video is an important part of the content but presenting doesn’t seem to be. I'm thinking here of businesses such as health and fitness. So you might be making videos to show your fitness routines but you don't think you need to present to camera. I speak here from personal experience — but pretty much all fitness routines are the same. A coach might have an individual take, but the actual routines are very similar. So what keeps customers coming back? It's your ability to engage with them on camera.
3. Where video is not part of a product. If you're selling products rather than services, you might not need this course. For example, if you're selling dog accessories. HOWEVER, if you want to increase the engagement between you and your customers, or you want to appear in your marketing videos, then you DO need this course. Making customers feel good about interacting with you is always a good thing.