This is exactly what the videos are for. No they are not going to stop predators. What they do is make people aware of what constitutes sexual harassment and assault. The Navy says any unwanted touching is grounds for sexual assault. It is a VERY narrow view that puts sailors on notice. Ie, you cannot touch someone’s arm if they don’t want you too.
What the training also does is teach people about reporting options, gives victims information on counseling options, and how by-standers can recognize situations before they escalate to assault or rape. The training is also backed up by swift punishment. If anyone tries to sweep it under the rug, they will be relieved of their duties.