Life ain't on YouTube...They won't upload videos of Bullies giving guys a beating...That ain't interesting(let's say),but the vice versa,is...
It's not that simple as "Punch him"
You have to have reached an end where you're upset and decided to do so...You're confronting one of your afraidnesses...So it's not as simple as just hitting.
You have to take determination,decide it,face him,and then well,hit him and be ready for a fight(which ain't close to be like on a videogame),and of course,think about the consequences...
Even those kids at the videos:They show you they beated a bully...But what happens after? He may (or may not) get bullied again by this Bully's friends,and it'll be worse...And unless you have some big balls,a unbreakable head, and expertisement in combat,it ain't gonna be easy to beat them all...
Conclusion:Use violence at your last element.Because the consequences aren't any good,