You Tube

"Founded in February 2005, YouTube is the leader in online video and the premier destination for you to watch and share original videos worldwide through a Web experience. YouTube allows people to easily upload and share video clips on uk.YouTube.com and across the Internet through websites, mobile devices, blogs and email. Everyone can watch videos on YouTube. People can see first-hand accounts of current events, find videos about their hobbies and interests and discover the…

Twitter

"Twitter is a free social networking and micro-blogging service that enables its users to send and read other users' updates known as tweets. Tweets are text-based posts of up to 140 characters in length which are displayed on the user's profile page and delivered to other users who have subscribed to them (known as followers). Senders can restrict delivery to those in their circle of friends or, by default, allow anybody to access them. Users…