First, the article does not say that she did not report this before she was fired. Perhaps she was fired because she was complaining about how she was being treated. What if she felt uncomfortable working with the guys that she accused and told her boss this. The NFLN would no longer need her services if she refused to work with some of the guys (those she accused). I am not saying that is what happened, but we cannot assume that she "waits to report this until she was fired".
Second, many people will not report such allegations because they want to keep their jobs and/or they don't want to create any problems. As noted in most of the preceding comments here, the accusers are not believed. So, why report the accusations and risk being shunned and/or fired if you won't be believed anyway. Also, people (colleagues) don't like those who "snitch", especially if doing so leads to others losing their jobs.
That being said, the allegations do seem hard to believe. Can folks be that dumb as to send naked pics and videos and risk their reputation and their jobs!! I hear that this happens all the time, but I don't get it. SMH... I will reserve judgment until I have more facts. Until then, it is all speculation.