Found 3 domains on youtu.be (173.194.113.73):

1. fra02s21-in-f9.1e100.net  []
2. o-o.preferred.beeline-evn1.v6.lscache5.c.youtube.com  []
3. o-o.preferred.belwue-str1.v23.lscache1.c.youtube.com  []


IP info: 173.194.113.73
ISP: Google
Geo: United States / Mountain View