Tutorial by Video DownloadHelper.
Video Download-Helper is a tool for capturing video streams, media galleries and images from websites. It can download video files in any available quality, record live streams directly. Video Download-helper also offers options for converting videos to other files formats.
Video Download-helper is a free plug-in for the browser Mozilla Firefox. A version for Google Chrome has also been available since 2015, but for technical reasons the plugin can download more videos if used in Firefox. For full HD downloads an additional conversion helper program is needed. HD videos will have watermarks with the free version of the conversion helper; a lifetime converter license must be purchased for full functionality without watermarks.
Plug-in link for Firefox: https://addons.mozilla.org/firefox/addon/video-downloadhelper
Plug-in link for Chrome: https://chrome.google.com/webstore/detail/video-downloadhelper/lmjnegcaeklhafolokijcfjliaokphfk