Hello,
Youtube has many addresses and they change depending on who You ask :-). Here is an example from where I am:
C:\WINDOWS\system32>nslookup www.youtube.com. 8.8.8.8
Server: google-public-dns-a.google.com
Address: 8.8.8.8
Non-authoritative answer:
Name: youtube-ui.l.google.com
Addresses: 2a00:1450:400e:809::200e
172.217.17.46
172.217.17.78
172.217.19.206
172.217.20.110
216.58.212.142
172.217.17.110
172.217.17.142
216.58.211.110
172.217.20.78
216.58.212.206
Aliases: www.youtube.comFrom another public DNS:
C:\WINDOWS\system32>nslookup www.youtube.com. 4.2.2.2
Server: b.resolvers.Level3.net
Address: 4.2.2.2
Non-authoritative answer:
Name: youtube-ui.l.google.com
Addresses: 2a00:1450:4005:800::200e
216.58.213.238
172.217.16.78
216.58.213.206
172.217.19.78
Aliases: www.youtube.comHTH
Thx
Alex