javascript - How to extract the direct facebook video url -

i trying extract url facebook video file page facebook video link not able proceed how.

for example: facebook video url have is: https://www.facebook.com/nerdandco/videos/1662140250706521/

the facebook video file url want extract is: https://video-ord1-1.xx.fbcdn.net/hvideo-xpf1/v/t42.1790-2/12616394_491864644347782_1646982338_n.mp4?efg=eyjybhiioju2nywicmxhijo1mtisinzlbmnvzgvfdgfnijoidjnfndi2x2nyzl8ym19tywluxzmumf9zzcj9&rl=567&vabr=315&oh=333a80044ec836e9b2228afb58cba6c1&oe=56a51d9b

how url using php or javascript? in advance :)

here example http command...

https://graph.facebook.com/v2.5/nerdandco/videos/?fields=backdated_time_granularity,content_category,copyrighted,backdated_time,created_time,description,embeddable,permalink_url,from,embed_html,source,icon,id,is_instagram_eligible,length,picture,place,privacy,published,status,scheduled_publish_time,title,updated_time,captions,comments,sharedposts,likes,tags,thumbnails&limit=10&access_token=<retrieve own access token> 

notice can play around fields you're querying for, username , objects you're requesting (in case, videos).

however, notice must create own access tokens , queries make have name on them, (so don't abuse this).

you can play around (and create own access token) facebook's api in graph explorer tool: https://developers.facebook.com/tools/explorer/

and i'd recommend reading more in facebook developers site.

good luck! :)