Nmap scan report for youtu.be (172.217.21.206)
Host is up (0.046s latency).
Other addresses for youtu.be (not scanned): 2a00:1450:4017:818::200e
rDNS record for 172.217.21.206: fra16s12-in-f206.1e100.net
Not shown: 98 filtered tcp ports (no-response)
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 2.52 seconds