Probably the same reason as limiting twitter messages which many people like you criticized when they were just starting. I think thats actually a great idea

Probably the same reason as limiting twitter messages which many people like you criticized when they were just starting. I think thats actually a great idea to limit video length, the reason behind it is to force people to film only the important and most interesting parts of the process, this will attract more people to watch it vs just film videos. There is a clip of a girl learning to monocycle, I watched it because it's very short, if it was 1min+ I would never watch it otherwise.