Personally, I'm not 100% sure those videos are a net benefit for teams. It definitely reduces the effort required by the person creating the video, but comes at the expense of requiring more effort from the people consuming the content. While there are certainly cases where showing is easier than telling, more often I find the quick videos are more verbose and less well organized than a doc or a message. "I didn't have time to write a short letter, so I [recorded a video] instead."
Who knows, maybe the counterfactual isn't "wrote a concise doc," but rather "didn't share the information at all," in which case I suppose Loom et al is a positive.