Good effort but let's talk about some negatives:

 - long video: try to make it short and consist of 4 to 5 minutes talking about a particular subject such as a Merit or trust system.
 - Customizing topics: I do not expect learning how to create an account is difficult but the basic skills to define boards, how to do make a search, and improve the quality of posts.
 - Define the rules better: Perhaps the rules are one of the things that need to be explained (with some fun.)

Generally, what I liked was the clarity of the sound and the accuracy of the explanation.