I think both videos are fine, and better than I could have come up with!
I think you should add bit about signage; on most Blackwood straights, there are both countdown markers (100, 50) and arrow signs to show which way the next turn goes.
I would imagine most people, even with the mini map, aren't sure which way to go, so prompting to look out for corner signs might help, and where there are countdown markers, these are usually placed at corners where you need to do a lot of braking.
Also, break up video a bit with some on track examples - show start lights go green, show how to put car in gear, show how to press down on gas. First corner, look at direction sign to see which way to go, and look at distance markers to give you an idea of where to brake (150 might be early for most turns, and 50 is getting late!).
Lots of people will crash, so show a crash, and how to reset to get car repaired (press button, get in gear, press gas to go).
Maybe show them screenshot of the car they'll be driving, and what its top speed is. Big maybe - let them know what the WR is for the track/car combo is, and if only they are as good as they think they are ...!!
InSim - I once did a layout where I provided option for "Pace Notes" - for example, see my YouTube video -
HERE Skip first 1 min 20 secs, and turn sound down a bit.
Plus, don't know how long normal queue time may be, but maybe time your video to show at least twice during this waiting time. First time, most people may not realise what its meant for, and 2nd time gives them time to take it in.
Lastly, show some bloopers of people getting it totally wrong - let the new drivers know what the competition is like!
Good luck