Grooveshark lets you search for songs and play them. You can find just about any song as a high quality mp3. Other sites charge for what Grooveshark offers for free.
YouTube is one of the most popular sites on the net. You can share videos from your computer or even your smart phone. It is no surprise that Google bought YouTube for 1.65 billion dollars. YouTube is the best video site mainly because of its popularity, although it is a pretty good site in its own right.
