Welcome to the first lesson about the 'Internet'.
You made a video on the 'Internet', congratulations on your piece of work!
90% of material uploaded are hard evidence for the creators incompetence, laziness, stupidity or simply that they're new to the whole 'thing'.
As is most likely the case, atleast one of these might be fitting on you! And as the internet is accessable to practically everyone, you just proved that to the entire world.
Don't entirely give up on your life, though. True, anonimity turns nearly everyone into a dickwad, so be prepared to be heavily flamed. However, this is not the case for everyone!
Indeed, some people are able to give constructive criticism. Well...more or less. Still, look at your feedback and try to derive a lesson from it.
And remember, flaming criticism means that the criticism is well placed.
tl;dr You showed yourself as a giant tool infront of everyone. Man up, listen and improve yourself. If you're not willing to, get off the internet, this is the wrong place for you.