I seen a lot of these speed drawing videos on youtube.
I like a lot of those speed drawing videos because it gives you a chance to observe different drawing processes.
You seem to draw straight ahead rather than create the skeleton of that drawing first.
Were you drawing from memory or using reference material?
Drawing can often be a very slow process and I assume it took patience to edit your video as well.
You could include stats about the time it took for creating your drawing.
I will assume your time would be around a half hour.
Including stats about time, art supplies and other things would create a more interesting speed drawing video.
Maybe the next video might be more interesting.
I hope these suggestions help with creating a better speed drawing video in the future.