Given that many people (including GP and me) prefer document content (not "text" because you can put interactive tools and diagrams in documents, but not text) and it has all of those advantages, it seems like it's pretty clearly the superior medium.
Plus, human brains are notoriously bad at introspection, so I wouldn't be surprised if you don't actually learn faster from videos, and just prefer them because they're e.g. more engaging.
My work has been trying to promote e-learning with ted talk-like videos and I absolutely hate it. It's not just about the speed.
I can learn so much quicker with text. I can skim through the parts I already know and spend more time on the parts I need to carefully consider. With video I need to skip around and it's hard to keep track of what's being discussed then.
I think it's really the younger people in the organisation that ask for it because they're used to youtubes. I rarely watch youtube, probably once a month or so. Makes sense but they try to push it on everyone by setting a goal of so many videos to do.
However even when I was young I thought that classroom teaching was inefficient and I could learn much better myself. One of the problems (also with video) is that you have to slow to the speed of the slowest participant.