Sample url: http://www.khanacademy.org/video/one-time-pad
There are many students who are looking for educational material which will help them get through their exams. There are many websites that offer video lectures on different subjects of every level. One such website is Khan Academy. The problem is that it does not allow you to download. It can be a problem for a student to watch the video online as there are many issues such as limited bandwidth or the video will not load properly if the internet connection is not too good. This problem has a solution, and that is to download the lecture of the related subject and watch it later as many times as you want. This is a good way to understand everything you want to about a subject. With so many lectures and materials available on different subjects, it is now possible to download them and watch them offline.
On this website, you will find video lectures and helpful material on subjects like physics, math, English, computer, statistics, and much more. If you want to view those lectures again and again, you can download them. Generally, it may not be possible to download videos from Khan Academy, so many people try different things which do not work.
With the help of TubeNinja, you can save all the video lectures from the website that you want to see in the future or do not have time to watch right now. The downloadable videos are provided in different sizes with different qualities: 720p, 360p, 240p, 144p and MP3 for just listening to the audio. If you are on a low bandwidth, then you can just download the audio and listen to the lectures in audio. This really is helpful for many people who are used to listening to audios.