Before you can start getting paid, you'll need to reach the payment threshold. This varies depending on your currency. In the US, the payment threshold is $100. This means you'll need to earn $100 before you can start collecting any money. If you've hit your payment threshold, you'll be paid around the 21st of every month. If you didn't meet the threshold, that money will be rolled over into next month's amount.
YouTube does not usually offer a download link for its videos, and intends for them to be viewed through its website interface. A small number of videos, can be downloaded as MP4 files. Numerous third-party web sites, applications and browser plug-ins allow users to download YouTube videos. In February 2009, YouTube announced a test service, allowing some partners to offer video downloads for free or for a fee paid through Google Checkout. In June 2012, Google sent cease and desist letters threatening legal action against several websites offering online download and conversion of YouTube videos. In response, Zamzar removed the ability to download YouTube videos from its site.
YouTube earns advertising revenue from Google AdSense, a program which targets ads according to site content and audience. The vast majority of its videos are free to view, but there are exceptions, including subscription-based premium channels, film rentals, as well as YouTube Premium, a subscription service offering ad-free access to the website and access to exclusive content made in partnership with existing users.