Is the video available to you? Can you Watch the video?

  1. Go to the private video page on Facebook.com.
  2. Press CTRL + U button to view page source
              OR
    right click on the page fb private video, then click on the option "View page source code"
  3. On the page source tab, copy all the source code text. (Use CTRL + A to select all and then CTRL + C to copy).
  4. In the below text field paste all source text you have copied using CTRL + V
  5. Click on the "Download" button

Paste full text of 'view source' from Facebook video page here...