Everything. I think there need to be a nice introduction video that gives a good overview about how the platform functions, and then a "how to get started steeming" video - make that one fun (how to curate, comment, and what to expect). There needs to be videos about using the editor (for sure! that one was a toughy for me at first), and videos for performing tasks like powering up or down, and what it all means; plus helpful videos on how to cash out and how to buy Steem. I'd like to see a whole library of short, one- to two-minute videos for people to reference.