Greetings. I find that to be a common issue with many “tutorial” videos from all sources. A particular feature is to be demonstrated, then, when the key mouse click, menu choice, sequences of steps is explained, the presenter flashes though the critical items and it is difficult for viewers to see what exactly was done.
You’ll quickly get used to the “recording modes.” If, for example, you record a 16 measure loop and play though several takes, Cubase records “lanes” if the recording options set-up to do that. Midi and Audio are a bit different. It is all explained in the documentation and there are good videos on the basics.
If you have Lanes – you may Solo those, you may select them and hear them, you may turn the lanes into actual tracks, or you may Comp. the lanes into a single take. Remember to turn Monitor off after recording to listen to playback. All this will quickly become second nature to you.
Good luck. 