Hey Divyansh! Look at Youtube as a media company or as a modern TV channel. It is a big opportunity for companies to place their advertisements. (The ads we mostly skip before the starting of a video) So if you want to make money on Youtube, first you will have to create something popular with valuable content so you get more people to watch and subscribe to your channel. Once you have a decent number of audience, then you can invite ads to your channel. It is the advertisements that actually pay a Youtuber for every second of their ad watched by an audience. Either you can have ads before your videos start or you can personally add content which promotes a brand or a product in your video. So to have a successful career on Youtube, you have to be good at constantly creating new engaging videos, learn some basic video and audio editing skills, learn marketing basics on social media, dedicate time and effort to build your subscribers and get a lot of people to wa tch your videos. All said and done, there is definitely time and work involved in creating a successful channel but all the resources and skills you need to learn are easily available on the internet.
Is is legal to post movies just after 1 or 2 weeks of its realse date?
It's never legal to release movies online or otherwise without the permission of the concerned authorities. You need the official certification from the distributors of the movie. Google and YouTube have very strict policy regarding piracy and I would not recommend dealing with illegal activities such as piracy.
Then posting movies after they are removed from the cinema hall?
No it's still illegal. It's called piracy.The only legal ways to watch a movie are to watch it in the cinema hall,buy an official DVD or stream it online on permitted sites(The websites who have bought the right to stream the movie from the producers for eg.Netflix)