How to download videos from YouTube?

Probably, there is very small percentage of people who are using the Internet, but have never heard/used the video service in Google ownership – YouTube. Firstly, on YouTube you could find video clips (music spots and similar) of all different “qualities“ and resolutions. Last year, in November YouTube has allowed uploading of 720p video clips. Videos with lower resolution (which was only supported) you could easily download with Javascipt code in the Bookmark folder of your browser (I am using Firefox). With HD video that’s doesn’t work anymore, but I have found a matching code for the download of HD video, also. (more…)