Along with my coworkers I randomly found a pornographic video of a female colleague and I'm going to share it.
Is your reasoning for doing this because of jealousy?
Yes, I don't like competition so I'm going to let my male colleagues know about her
That's a pretty awful thing to do.  If you're so jealous, push yourself to compete harder with her.  Sharing porn of a coworker is totally unprofessional and downright rude.
Whatever, it will harm her reputation.
Sharing this pornographic video is not only morally loathsome but potentially illegal. If you want to get ahead at work you need to take this energy and apply it in a way that will actually benefit you, not destroy others.