How to Download a youtube video (No software needed)
When we see a content on our browser,the browser saves it in cache.
we can retrieve anything from the cache .
Note:-If the method does't work in 360p ,try using 480p OR higher option.Sometimes opera doesn't recognize the file extention of YT's 360p video file.
If you want download button get it from here(http://bit.ly/j8PiY6)