shell:$ nslookup -timeout=2 -retry=1 'a.rtmp.youtube.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	a.rtmp.youtube.com
Address: 142.250.191.140
Name:	a.rtmp.youtube.com
Address: 142.250.191.236
Name:	a.rtmp.youtube.com
Address: 142.250.191.204
Name:	a.rtmp.youtube.com
Address: 142.251.34.236
Name:	a.rtmp.youtube.com
Address: 142.250.190.140
Name:	a.rtmp.youtube.com
Address: 142.250.190.76
Name:	a.rtmp.youtube.com
Address: 142.250.191.172
Name:	a.rtmp.youtube.com
Address: 142.250.189.108
Name:	a.rtmp.youtube.com
Address: 172.217.4.44
Name:	a.rtmp.youtube.com
Address: 142.250.190.108
Name:	a.rtmp.youtube.com
Address: 172.217.4.76
Name:	a.rtmp.youtube.com
Address: 172.217.4.204
Name:	a.rtmp.youtube.com
Address: 172.217.1.108
Name:	a.rtmp.youtube.com
Address: 142.250.190.44
Name:	a.rtmp.youtube.com
Address: 142.251.41.140
Name:	a.rtmp.youtube.com
Address: 142.250.191.108
Name:	a.rtmp.youtube.com
Address: 2607:f8b0:4009:81a::200c
Name:	a.rtmp.youtube.com
Address: 2607:f8b0:4009:817::200c
Name:	a.rtmp.youtube.com
Address: 2607:f8b0:4009:819::200c
Name:	a.rtmp.youtube.com
Address: 2607:f8b0:4009:818::200c