There are so many softwares right now on the web to download videos off youtube, and other video sharing sites.

Youtube is offering a free download to permitted videos

Youtube is saying enough, we are going to give you the videos free in high quality.

If the author of the video agrees for people to download it, then you would see a download link below the video. If you don’t see the download link, you either have to purches the video or use one of the hacking methods.