Videos also exacerbate the problems with the tendency to link to a thing without bothering to say what it is. With a textual page it's not too costly to just follow the link and give it a ten-second eyeballing to figure out whether it was something you cared about (although even then I tend to wish the linker had given a one-sentence summary). But with a video, it can easily take several minutes just to find out what it's about, because of loading time, title sequences and waffly introductions.