regex - I need to match ID video of a facebook video link -

i need match id video of facebook video link:

https://www.facebook.com/dibattista.alessandro/videos/689793084466092/?pnref=story

p.s.

• dibattista.alessandro dynamic;
• https or http;
• ://www.facebook.com/ , /videos/ static;
• /?pnref=story maybe not exist.

i'm not pratic regular expressions.

can me?

you can use regex positive ahead this:

\d+(?=\/\?|$) 

working demo