Why don't you tell us what you learned? You keep mentioning that you learned something, but don't tell us what you learned or how you learned it. Why is that?

Based on what I saw in the video, and my own experience in the sport, I have my own impression as you know. A couple of points to rebut your response:

First, the boy's father would naturally be nervous for him. I have children and am always nervous if I am watching them perform, worried that something can go wrong, regardless of their training or talent. So what?

Second, the dad is not there every day watching his son like the coach is, so he cannot know the full extent of his own son's ability or talent. Clearly the boy had talent. Did any other player hit 6 straight 3-pointers in that game or any game that season, regardless of the defense and strategy of the other players to help them do that? I bet the answer is 'NO.'

However, lots of teams - football & basketball put their 2nd or 3rd string players in when they are doing well and have a large point buffer. I bet the coach could have allowed this boy opportunities here and there throughout the season if he had wanted to.

I coached a youth basketball team years ago. I made sure that everyone got equal time on the court, regardless of their talent - that is, if they put in the effort, showed up for practice and did the drills. I made a chart before every game to make sure I got each boy in about the same amount. The team members had very high morale and were really united because everyone was treated with value.

In this boy's case, the coach admits to how hard he worked, how much he benefitted the team. Had I been the coach, I would have considered letting him play the last quarter in any game where my team was far ahead.