Ok so lately I have been wanting to play music from some of my favorite shows. When I play something that isn't mainstream it can be kinda hard to find sheet music on a website so I find a video that links it. I tend to look/listen at people actually playing the song to get a real-world piano sound to help me get a sense of what it should sound like, I know that sounds weird.
One thing that I have noticed, in the videos where people show their hands when playing and face, is that the player looks directly at their hands whilst playing the song (or piece depending on if it's an intro or not).
I think they may have either memorized the sheet music or played by ear, but still, I am being taught to try not to look at my hands. Am I being taught wrong or am I just confused? If so, can you explain what I am missing?