I wonder why the thread opener was banned and I think its all because of the cat video in which obviously cannot contribute in this reputable forum because it doesn't relate on webmaster after all. Easiest and fastest way to make money online? There is no magic here! you need to work hard and invest for it.
Or, create some Prank video... Just think of some interesting plan and do that with your friends, and record it with your android/iphone. It's as simple as that. People love to watch pranks. And, if your pranks would be interesting, you'll grow your channel in no time too, and in fact earn a handsome amount of profit as well...
Make a video of yourself if you think your face means a lot or if you have a voice that's simply out of this world.
If you have a very cute baby yes it can go viral but babies grow up.. Animal videos can do well too. I remember watching the angry ram videos on youtube. I thought about doing a work out video but got into it too late and the competition is fierce in youtube. Nowadays there are some people that go all out on youtube. Look at the most popular channel and the time and work and yes money they put into it is pretty big to become popular.