Ok I finally had a chance to watch those videos — they were both great! To me, that’s sort of the “dream” of sightreading, to be able to sit down with a score the way Tiffany did with “to a wild rose” and play it, having never heard it before, and at the end, say “oh that’s really pretty.” IOW to have sightreading be a way to discover new music to play. Or, like pleasure reading (i.e., text, fiction etc)
At the same time, it was very relatable to see her look at the Bach and talk about how hard it is to sightread. I am sure there are people who can truly sightread Bach (but I will never be one of them)
Also, with the guy’s video, I was reading along with the score so I didn’t notice, but I really noticed with Tiffany’s video how her eyes are on the score probably 100% of the time.
The other thing I wanted to know with her is just how far she’s looking ahead in the music.
Keeping my eyes on the score (not looking down) and reading ahead are two areas that I think I need to improve on when sightreading.
Well and also musicality. As @ranjit noted, Tiffany’s playing was very musical, even just when sightreading, and that, to me, is really the goal.