To be honest, it depends.

If the pedestrian hasn't gotten to the driveway quite yet, and you're stopping to let them get there and cross out of an abundance of caution, then it may not have been legally required for you to yield. And the motorcyclist behind you could very reasonably have seen the pedestrian too (and reasoned that the pedestrian was still several seconds away from getting to the driveway) and not expected you to stop. In such a situation, such an abundance of caution could have easily "caused" an accident, in that not yielding and proceeding through would have been perfectly safe.

(I'm of course being steel-manning GP's argument here, it could have very easily been that the pedestrian was already crossing the driveway at that point, I didn't see the video. Point is, "more caution" doesn't always mean "less chance of an accident".)