Lighting, Lighting, Lighting.
I downloaded your clip and looked at it.
It does not look bad, it does not seem like you have a prob with the camera.
It’s poor lighting. And poor camera handling.
Shooting in a darker hotel hall will be fine b/c u’ll have lighting on the stage.
But you might want to learn more about the camera settings and what to tweak and what to use to get a picture more to your liking.
Go out side and shoot some pretty stuff using a tripod.
Chris Tompkins
Video Atlanta LLC