I recorded this test video and something's not quite right, but I can't figure out what. I'm not sure if it's the video, the audio, or both... It looks like B major, sounds like B major, and yet it doesn't! Any idea what's going on here?

Hi
I would suggest you re-post this on the digital piano forum.

Not sure. It sounds B major to me. That is - to me, it looks like B major, sounds like B major, and ------ I guess that's because it is B major.

I can also add that the scale played in that way sounds relaxing and pleasant.