@Warsha Piyumal I watched part of your video. English isn't my native language (I'm Italian), but I understood almost everything you said, especially when you explain, you're more precise with your pronunciation. I think a whiteboard is a good place to start; it's more authentic and genuine. Let me suggest writing the words larger, keeping mobile viewers in mind. The easier you make them to listen and watch, the better your retention will be. You could try reducing the overall length of your videos to under 10 minutes, getting to the point as quickly as possible and keeping the introduction and hook very short. You can see the effectiveness of your hook and introduction by looking at the retention curve once the video gets enough views.