I would not be in a hurry to publish your course without a promo video. When people visit your course they are going to see a video, which will be your first video, and that will promote or turn away potential students. The truth is that in the first ten or twenty seconds of watching the first video, students make a decision, to either look for something else, or to study your course further. You don't have a choice about that.
There is no point in publishing a course without thinking through what attracts a student. Otherwise you are wasting your time.
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