What is the difference between streaming and downloading?

Streaming is playing audio/video content in real time through the Internet. This does not eat up any space on your computer's hard drive.

A fast Internet connection is required to view the videos at its clearest because the video quality is dependent on the speed of your connection. If you experience frequent pauses or buffering on your viewing or if you're not satisfied with the quality, consider downloading the clip (if possible).

Downloading is transferring data from a server into your own computer. You need to have sufficient hard drive space to be able to save the content.

Although downloading may take some time, the advantages are that you can watch the content anytime since it's already saved in your computer and you don't need to be connected to the Internet to watch the video. The video will also be of higher quality with no interruptions upon playback.