Of course YouTube is very good platform for earning . Make some good video stuffs and upload on it, to earn good
In my research the best way to currently make money on YouTube is to do a gaming channel. Basically you need to be an expert gamer, then you need to play a lot and record your games. YouTubers go nuts over watching these gaming videos, don't ask me why, I am not a gamer. But, the people with consistently high viewer numbers are either celebrities or gamers. I think it would be easier to become a gamer. Then you need to get into a channel partner group, they will handle the ads on your videos and they pay much more than YouTube does for sponsored ads. It is then a matter of putting up one new video a day and spend the rest of the day commenting on other videos.
You will need to make a viral video. If I were you, I would sit down and watch as many videos that went viral as possible and try to think of ideas.
Youtube is best way to earn good income but its also important that we do workd hard for get it, So you need to select niche and start making videos on your niche and you can monetize your videos with adsense or cpa offers because this most common source for monetize.