A total of 12 sites are hosted on 172.217.21.142.
Here are the first 5 as they would appear when searched for:
youtube.com/user/FacemRecordsTV
(null)
youtube.com/user/josespana
(null)
youtube.com/user/Prze19
(null)
youtube.com/user/LudacrisVEVO
(null)
youtube.com/user/TottiHookah
(null)
...and the list of the remaining 7:
youtube.com/user/RolioPlayGames
youtube.com/user/philipcrown
youtube.com/user/faireset2
youtube.com/user/OsmanliSoylusu
youtube.com/user/KADOKAWAanime
youtube.com/user/theseomethod
youtube.com/user/CorsairMemoryInc