Now, this isn't an indictment against videos that use these b-roll elements in their spots. I've used them myself on various projects.
Rather, I bring this up, 1) to acknowledge that a certain genre of video (like a school commercial) will, more often than not, contain common elements, and 2) to challenge all of us as video producers, advertisers, and marketers to find that which differentiates our clients from their competitors, and to create content that turns right, when everyone else is turns left.
The problem with school videos that use similar visual elements, music, talking points, etc. is that there's nothing in the spot that differentiates one school from another. You could simply take the same spot and just replace the logo at the end. Always ask: what's unique about this client?
For some schools, the answer might be attitude. Consider this spot from the University of Oregon. It contains some of the same b-roll shots you see in other school videos, but the difference is in the scripting and in the edit. The piece has a definite edge, giving you the impression that the university has a distinct energy that's slightly rebellious; an energy that breaks the mold, blazes new trails, and impacts the world. It leaves you with the feeling that Oregon is a place that defies the norm.