Why do you think they need to get ahold of some tape?
They didn't, but probably not for the reasons you intended. The original footage was awful enough to justify a stiff punishment, not the slap on the wrist initially imposed.
And many many times they are lying or exaggerating.
True, but in this instance the reporters who described the footage months ago got it right. We're not talking about witnesses at the casino (obviously only two people were in the elevator) but reporters who saw the footage itself. They said the footage (at the time unseen by the public) showed Rice cold-cocking her, and her head striking the handrail inside the elevator. This was common knowledge, discussed on ESPN and the rest, before Monday's news. The new footage's contents were not revelations, in other words.
You would not say this if the shoe is on the other foot. If you were an employer and your employee was arrested for something, it is unlikely you act this way saying he should be fired right now.
This is a unique situation: a public figure exposed as a wife beater and surrounded by enablers who knew better, and still chose to make the wrong decision. It's apparent throughout this entire process that the NFL didn't take the situation seriously and consistently sided with Rice. They got it wrong, top to bottom, start to finish.
It is not the NFL's place to do anything with Rice.
Tolerating criminal behavior is the wrong decision. And I'm sure this constitutes a violation of their personal conduct guidelines.