I went back to watch Biden arriving at the White House as it was mentioned that nobody opened the door for him (lol).

I also noticed that the band seemed to play "Hail to the Chief" in a strange way... after the introductory fanfare (the four "ruffles and feathers") there seemed to be an awkward key change (+2 semitones) when the actual melody comes in.

Listen here: https://youtu.be/eHEApCpnmwc?t=139

Does anyone know why that might have been?

I thought it might be worth mentioning as another weird anomaly that occurred during the transition.

EDIT: I found another example where this happens. Still not sure why. https://www.youtube.com/watch?v=JW8AJds1CzI

Perhaps its different between Army Band (^^) and Marine Band: https://www.youtube.com/watch?v=hq8HzYcEBh8