I do know this answer is is not appropriate to the question. But I think it is suitable to mention it in this popular question.
Video tutotials for using the site as well as for Frequently Asked Questions would be Fruitful. ( For things like Using terminal, using Software Center, Find applications.etc.)
People find it difficult to change into different environment in Ubuntu. You can see this with questions. Only the people with literacy is high can get benefit from written answers. Certain people are unable to even submit a question. (They are the majority in the society !).Can refer Questions for those videos even.
Separate section with hosting video tutorials would be beneficial.(I am a videographer and I would happily pay my voluntary contribution if such a thing is there).