How to download facebook private video

Dear members,
I have joined a private group of video on investment, from time to time, the group will post video, unfortunately when I copy to video link, paste into add video, it does not work to download, anyway to overcome the trouble
Thank you for kindest assistance

May be you about it "How to download video from Facebook"

Tried to copy the link and paste in AntManager, unfortunately failed,  Thanks

Any member please show me above facebook how to do the download:
https://www.facebook.com/yong.yik/videos/1500955800034877/
Thank you

Sorry, this content isn't available right now
The link you followed may have expired, or the page may only be visible to an audience you're not in.

Obviously the program will not be able to download such a link.
It is protected by additional means of Facebook protection.

Try other services.

Thank you !
That means Ant Manager cannot use it to download the private group video in facebook