Yes and yes!
Never snap a photo, never shoot a video about a disabled person without the disabled person's consent. It doesn’t matter that you admire the thing you are depicting. It doesn’t matter that you do it to make people happy or uplift them, or teach them a lesson about gratitude. What matters is the result, and if the disabled person isn't on board with the situation or being used in your little morality play, any good you think you’re doing will be undone.