Share a facebook video on whatsapp

From raju

Download the video
In facebook, right click on the video -> Copy video URL at current time
-> paste it in (for public videos), (for private videos)
-> remove ?t=NNN at the end -> Download

For example, if you got

paste it and change it to
Edit the video (if necessary)
For example, to copy the first 10.5 seconds of src.mp4 to dest.mp4
    ffmpeg -ss 00:00:00 -i src.mp4 -to 00:00:10.5 -c copy dest.mp4

Upload it to whatsapp.