I'd say part of the solution is explained in the animation itself: you don't have to feel this way if you're getting bullied.
Parents have a role to play. My parents always told me to not pay attention (I was the smallest kids in my class from 4 years old to 15 years old or so, so people would tease me all the time). And I didn't pay attention.
Then he talks in the animation about bearded girls: parents have to intervene here. I was a boy but when I started having a mustache, which looked silly in retrospect on the tiniest kid in the class, they offered me an electric razor. I hated that day the day it happened. But then I realized I had to shave.
Same for bearded girls: parents have to take her to do laser elimination of the beard. Common.
If parents have a fat kid, they should confiscate coke and sodas and force the kid to go exercice a bit. A daily run. Something. It was tennis and bycicling for me (not that I've ever been fat).
Sure bullying is lame. But acting like a victim is not ok.
I agree that fighting back is not always easy, but it's not always mandatory to physically fight back either. As someone else already commented here: if they insult you, you can fight back verbally (being smart makes it all too easy to be really mean in retaliation ; )
"Nobody can make you feel inferior without your consent".
We're all past the age of getting bullied and we can understand that nobody can make us feel inferior without our consent. Now we have to remember to raise our kids properly, so that they never become victims.