I watch a lot of YouTube videos about my hobby, and although I don't post videos myself, I can comment on what I like in videos and why I prefer some over others. Many of the most popular channels are personalities. They are just individuals who act like individuals and don't hold back their comments to try and be liked by everyone, and as a result, a lot of people subscribe and like them! They are also good communicators. The videos are well edited, and I don't mean professionally edited, but enough that it looks like they put some time into even a 3 minute video. I think by putting some time into the development, or brainstorming an 'itinerary' for your video will help people follow your discussion and in turn subscribe.