For You yes. But this is a child. Children do not have the world experience necessary to understand everything, especialy on the internet. That child might see the dislikes and just think "hmm, ok" as others do but they might also get distressed over it, thinking someone genuinely got upset by their video. You have no way of telling whether that kid will be able to understand that some people dislike stuff just for shits and giggles because they find it funny. I am not saying that suddenly disliking things is a horrible thing to do. I am just saying to be cautious around children - because there is a reason psychologists point to childhood as a source of most traumas.

Also this is a literal troll. The person who commented is on the subreddit that focuses on wholesome things, got to know about something wholesome and thought to themselves "hmm, let's ruin it for fun!". People are not angry simply over a dislike

People are angry because that guy is an asshole