That's the natural state of innocence - their reference frame is how the experience feels (I'm going fast and almost falling over!). When the scene takes over, the reference point shifts to how it looks - the raw experience is overtaken in importance by progress and status and comparison.
I accept this valid criticism of "posers" but I'd like to add that there's a strange loop here. It feels alien to me, but lots of people I know like to watch videos of themselves doing things (e.g. choreographed dances). It certainly does help to see how to improve, but also they get satisfaction from seeing themselves do the thing.
When I make things, I often spend time confirming the work is done. And seeing what I actually made.
It is part of the psychological experience of making things for me.
Look at you get satisfaction from recording in language observation of human agency.