My impressions are that the videos are too long, or alternately that the actual content is too sparse. I'd suggest getting to the point earlier and being more efficient, since presumably the videos are intended to convey information and teach and not necessarily to entertain.
I did like the humor, I would not take that out.
Also, the first two videos seem like mostly a waste of time... since they cover little ground as far as teaching the actual topic (i.e. how to become a game developer). I'd suggest skipping going over what games are, and just assume that people know what a game is and what constitutes a game. I'd start off with describing what the breakdown is of skills, jobs, and responsibilities within a project or dev team/studio. Then once you have that breakdown, you can proceed to what specific knowledge and education you need for each.
I also agree with comments above that you need to start off with some explanation of your qualifications and relevant experience. Presuming that you have decent qualifications, this will instill confidence in the people watching the videos, and preempt the inevitable arguments and criticisms about your qualification and whether you should even be making the videos.