YouTube

1. stakeholders

1.1. people who upload videos

1.1.1. adolescents

1.1.2. teachers

1.1.3. pop star

1.1.4. director

1.2. people who watch videos

1.2.1. adolescents

1.2.2. normal residents

2. positive impacts

2.1. allow free flow of information in form of video

2.2. eliminate geographical boundary between people around the world

2.3. as a forum for people around the world to exchange their opinions

3. negative impacts

3.1. people may addicted to watch videos on YouTube

3.2. some people may upload some copyrighted movies to YouTube thus violate intellectual property right

3.3. personal information may be leaked easily

4. types of videos on YouTube

4.1. Music

4.1.1. MV

4.2. comedy

4.2.1. funny little videos

4.3. film and entertainment

4.3.1. TV programmes

4.3.2. movie trailers

4.4. gaming

4.4.1. video games

4.5. animation

4.5.1. cartoon

4.6. sports

4.6.1. sport events

4.6.2. competitons

4.7. science and education

4.7.1. educational TV programmes

4.7.2. scientific TV programmes

5. Other video-sharing websites similar to YouTube

5.1. Youku

5.2. Baidu

5.3. Tudou

6. Reasons for people to use YouTube

6.1. convenient to upload/watch different types of videos

6.2. The videos on YouTube can be shared to other social networking websites such as Facebook easily

6.3. There is a wide variety of videos provided on YouTube

6.4. There are few restrictions on uploading videos to YouTube