To use Ummy Video Downloader all you need is an Internet connection. It doesn't matter where you are; all you have to do is open the program, look for the video you want to save, copy the URL, and select the image quality that you want. You can only choose from the qualities the video was uploaded in, so you can't always find the same quality for all videos.
On the other hand, this application lets you extract only the audio from the videos if you don't need to save the images, so you can also use Ummy Video Downloader to create your own music library. The downloads can be saved to the folder of your choice, so make sure you select the correct destination.