VideoBus

VideoBus is an excellent app for accessing all the most important online video-streaming platforms, as well as downloading videos from popular websites like YouTube, Metacafe, Vimeo, and LiveLeaks.

When you open VideoBus, you'll see a directory with shortcuts to each and every one of the websites you can browse on this app. Tap on the icon for a video-streaming platform to see a replica of its interface which you can then use just as you would the app itself.

To download any of the videos directly to your smartphone, all you have to do is enter the video's URL, hit the arrow icon, and select certain options for the download in question which tend to change the resulting file's format or lower its resolution. After that, tap on 'download' to download the video immediately.