As one of the most popular and most free streaming resources on Internet, user should always be watchful for security threats and abide in accordance with digital laws protecting artists and contributors.

http://www.theverge.com/2017/2/27/14759102/youtube-billion-hours-watch-every-day

YouTube users are now watching more than a billion hours of videos every single day, the company has announced. Put back-to-back, that’s more than 100,000 years of footage, split between the millions of YouTube users across the world. The company announced the figure in a blog post published on Monday, but said that the billion-hour milestone was actually reached last year. YouTube said that it was now focusing more on the length of time people spent watching YouTube videos, rather than the overall views a video received — an internal decision made “a few years back” that it said would help the company understand if users enjoyed a video in question.