Most of them are still pictures, so there’s no sound. What I notice is the slouching posture, the poor self placement on stage, the disrespectful attire, and - possibly worst of all - hiding behind their music stands and buried in their sheet music.
Realistically, tuba players aren’t hired to play solos, but humans occasionally have to stand up in front of others and say things or even make speeches. Teachers must do this every day, and the vast majority of college children who played tuba solos in college on stage end up being school teachers.
… just a few observations this afternoon before I am through resting from the work I did earlier and about to get back up to do some more.