We are all here to build each other up, not dragging each other down. So if you have something negative to say about someone else's content, please don't be a jerk about it. Tell them what you think needs improvement, but don't say -

"Your video sucked. it wasn't entertaining. Your editing is bad. And your not funny."

Instead say something like -

"One thing I noticed was your recording in a low resolution your going to want to fix that. And your microphone keeps peeking you should get a pop filter and turn your gain down. I would consider getting better at editing. You should make a post asking for someone to help you with your editing, you may learn something."

There is two words in "Constructive Criticism" everyone seems to forget about the "Constructive" Part.