Look at it this way … a little kid pokes a frog and it jumps on him. He doesn't like it. Mom laughs (telling him it's not so serious, even though he doesn't like it). Then she makes it jump and it jumps right in his face. This really startles him and it makes a lasting impression on him that these creatures of the wild can really move fast! Mom laughs even harder … the kid learns about humility. Mom still loves him, so a little humility isn't so bad.
A few years later, he runs across a poisonous snake in the woods. He's had a lasting impression about things in the wild and he steers clear. Now, does the lesson make sense?
The funny thing about parenting … so many of these lessons come very naturally. We don't have to think everything through. We often do well without even putting any thought into it. Of course, bad parenting has opposite effects, that can't be denied. In this case, I can see nothing wrong in the humor displayed in this video with a little frog frightening a little kid.