iternabe In my original post, the note played differently between a YouTube teacher demo and mine was in a chord. But I only noticed it not by hearing the difference, but by looking at the YT teacher’s fingering.
You have to be careful doing that because a lot of videos have wrong stuff in them. For instance, when I was learning Energico I watched a video from someone trying to start off being a 'teacher.' Energico has an SMZ at the end and the final 2 notes are on both the treble and the bass staff (one each, lots of ledger lines for the treble note). The video I watched (and a couple of others) omitted the SMZ and just spread the LH for the final 2 notes since they're both down in the lower bass. This is incorrect and had I done the same I would have been incorrect because the score specifically notes to use both hands, not just the LH. Lesson: never rely on only 1 video because it could be wrong.
On the other hand, I've caught myself many times playing a wrong note (or three) by watching a video and realizing that it's an F instead of a G because I misread the ledger lines. I did it even though when playing it didn't sound right, but it wasn't until I watched a video that I caught it.
More staff training required in my case and remembering to trust my ears when they tell me something's not right. And maybe better glasses, them micro size staccato dots are killing me.