Been using Video Download Helper for some time now and I LOVE it. Actually just got notice I had downloaded my 300th video. Hence being invited to do this review.
It's so simple to use. Anytime you're viewing a video, and should you want to record it, all you do is click the little icon in the upper right corner of the toolbar. When you click the icon that opens a menu. This shows all available options to download the video you're viewing. Just scroll thru, find the speed and quality you want, click on that and then just wait for the download to complete. OH, and by all means continue to watch your video while the helper does it's thing. When it's done downloading you get a message in the lower right corner telling you it's done. And that's all there is to it. You now have a saved copy of the video in your files to re-watch whenever you choose to.
This is an excellent add on tool for anyone.