We can not fetch videos from this type of page.
Your URL was: http://verify_age?next_url=http%3A//www.youtube.com/watch%3Fv%3DhQmW4FW2jKg
The URL must be like http://www.youtube.com/watch?v=KPtX7hak0Qs
https://www.
and replace with pwn
Example: