whois youtu.be/lp1YcpBzWv4

Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)

youtu.be/lp1YcpBzWv4

checking....youtu.be/lp1YcpBzWv4
$ whois youtu.be/lp1YcpBzWv4
No whois server is known for this kind of object.