videos are easier to consume while doing something else. reading may be faster, but you can't drive to work, do the dishes, workout, etc. while reading. if you're not into multitasking then reading is the clearly better option, but I think most young people have grown up so surrounded by barrages of inormation from different sources all at once that multitasking comes extremely naturally to them
I have to say I also watch videos in background while doing other stuff, but that doesn't make it a better medium to convey information, just more practical when the information is not important enough to be the main focus of someone's attention, and that's pretty subjective.
But I do get the point, I just wish it was different.