For a long time I've discovered new artists on Youtube and have found some to have been very good.


However, I find that nowadays many are posting extremely short videos on Instagram, Twitter, and FB. Usually when they cover songs not of their own.


I can't understand why because I doubt most people wanna watch someone perform short videos in which you only near part of a song though very few people seem to say anything.

So do we know why it's the case with some and why those who watch seldom say anything?