It is quite easy to download public videos from Facebook. If you have the video link that you wish to download, all you need to do is copy it and then paste it into the input box. After you paste the link, click the "download" button which will redirect you to another page. You will be able to select the link you want to download. GetfBuzz is free to use and no registration is required.
If you want to download private videos from Facebook, you can do that with a private video downloader but getfbuzz.co is not supported as of now.
When you're downloading files, they are usually saved into whatever folder you have set as your default. Your browser normally sets this folder for you. In browser settings you can change and choose manually the destination folder for your downloded facebook videos.
Once streaming is done, you can easily save live FB videos to your device using GetfBuzz Facebook video Downloader chrome extension.
GetfBuzz doesn't store videos. Neither do we keep copies of downloaded videos. All videos are hosted on Facebook's servers. Also, we don't keep track of the download histories of our users, thus making using GetfBuzz totally anonymous.