Well, I can give you a begginer's perspective, considering I have only been flying about a month with my first solo last week.


1.) Arf building - The ARF I bought, the sig kadet lt-40 was pretty easy to assemble, but there were still issues I had , as well as tricks to building that I have done since the recommendations of others, but would have been easier to do during build. Note building tips such as putting a little piece of fuel tubing at the end of the control rod to slip over the plastic cleavis's. Another important issue I missed was the importance of proper downthrust alightment on the engine. There were some issues I had with making sure the throttle linkeage was set up properly, so that the engine could be killed with trim at the lowest setting. I also had some problems intially setting up the prop and prop nut properly and tight enough to keep it secure.

2.) Glow engine introduction:
From breaking in of the glow engine, intial use, proper adjustments, terminoligy, etc. I think it would have been very helpful to have some small intructional video on how to properly set up and use a glow engine.

3.) Instruction:
Having a good instuctor at the field is key, but I spent alot of time practicing on a simulator at home as well. I might be helpful to have some basic instruction video, mention some of the challenges of basic take off, basic turns, orientation of plane and proper control movements, and landings. A good section on preflight checks of the plane might be good as well.
Of course, perhaps short vids on various basic acrobatic and onwards would be helpful, but I am not quite there yet.

4.) basic repairs:
I had a few minor nicks on my wing after the wind flipped my plane on ground right after landing. It wasn't hard to figure out how to use utralcote to fix the damage, but still might be helpful to go over some basic repairs.

5.) crash response:
I have seen one total crash so far at my club. It might be good to let new people know what to salvage, and what not to salvage (depending on damage). Also, you might want to let them know what steps they need to do to clean out dirtfilled engines, etc.

6.) maybe a event vid, showing sample of various types of competitions, pylon racing, acrobatic contests, etc.