1. Once you click on Upload/Share a video, you will be taken to a new page where you can paste a file URL (via Paste URL) from another website such as Youtube or Vimeo.
2. You can select the category to which your video belongs to by clicking on the category tab
3. If you have opted to paste a URL, there will be a text box underneath the category tab to paste the URL there.
4. Once you are done just click Add.