I love it and I just hate seeing the videos of parents and coaches and umpires arguing and not setting a good example for kids. Hopefully this umpire gave the kid that was pitching some words of encouragement and coached him up a little.
It's really fuzzy, but I think it says 180 down the left field line. I can't read it for sure, but that first number doesn't look like a 2. Ordinarily I'd guess 200 for this age.
Umpires are supposed to be completely neutral. What this guy did celebrating that kid's home run may look nice, but it violates all the basic standards of being a neutral umpire and he should not have done that. Let the kid's teammates congratulate him and do your own job properly.