It was a new frontier. lol, yea, some of them don't hold up very well. There were new technologies becoming available and sometimes they were used just to be using the latest thing and not because they helped tell a story. And you'd see one video break ground with a style or technology and then a bunch of others use it.
Also, it was a good medium for young new filmmakers. They didn't have the budget or reputation to make big movies, but they could make a video. And you could try things in a video you couldn't risk in a big movie.