When you should be working or at an educational establishment no. If you mean in a video then it depends on what you were doing in the video in question. It isn't bad but most likely it will be bad for you if you don't like it.
no, not at all. Being an abomination is a very bad thing!
they are a bad thing for stoping endangered animals from being killed
no not at all
crashing
It's not a good or bad thing. You are you!
Being prejudice is bad; you look at others wrong.
not at all, be yourself.
Good
Being unfaithful
That question is really a matter of opinion. It's probably because all you've watched on Youtube is just really bad, or it could be that your tastes in certain things make you hate Youtube because it's [insert negative thing here].
Yes. being gay or lesbian is bad. it is a crime against nature.
Yes. Indubitably.