Ok, so a really reasonable one:
From you, just like from everybody else, I'd like to see videos that make sense that you make them. Like because you're a foremost expert in the topic or even the only one who can meaningfully talk about it.
For example: You're no doubt one of speedcubing's megastars. As such, people are interested in you personally, including your personal development, i.e., how you got to where you are as a cuber, and where you still want to go. How much do/did you practice? How did you start? What were you thinking at different stages of your cubing career? What else do you consider important? Where did you fail? What do you do besides cubing? What motivates you? Your personal perspective on the community and how it evolved? Nobody but you can talk about this. And I believe I'm not the only one who would like to see such a little documentary. Especially newbies are perhaps wondering "How can I become that good?".
This particular idea of a documentary about yourself might be a bit tricky, with a thin line between appearing to brag and offering insight, but I think if done right with a proper introduction and good mood (*) it could be very interesting and enjoyable.
(*) If I remember correctly, in one of your videos (I think the "what cubes I use") you made a terribly bored impression, at times bordering to condescending. Which I can perfectly understand, because newbies asking this over and over again can certainly be annoying, but if you want your videos to be popular, a positive mood can help a lot.