A total of 62 sites are hosted on 172.217.20.78.
Here are the first 5 as they would appear when searched for:
youtube.com/user/teamarika
(null)
youtube.com/user/160Days2Lose2
(null)
youtube.com/user/AverageAsianDude
(null)
youtube.com/user/PLayOnSub
(null)
youtube.com/user/alantutorial
(null)
...and the list of the remaining 57:
youtube.com/user/HerbalifeRus
youtube.com/user/SalsaHency
youtube.com/user/besteappskinder
youtube.com/user/winyvideos
youtube.com/user/tvpas09
youtube.com/user/LetsPlayBarny
youtube.com/user/MachinimaLatino
youtube.com/user/MrChesterccj
youtube.com/user/M7MDXDGames
youtube.com/user/4everlalaloopsy
youtube.com/user/gediminasgabalis
youtube.com/user/zf2tutoriais
youtube.com/user/FrostyManRUS
youtube.com/user/F2Freestylers
youtube.com/user/cookingwithnonna
youtube.com/user/Lufthansa
youtube.com/user/VoodyEpic
youtube.com/user/IdentityDjoloVideos
youtube.com/user/AZEKTIBIX
youtube.com/user/Redmercy
youtube.com/user/etvbanglaindia
youtube.com/user/OxydeBase
youtube.com/user/OFFICIALMUTANTTV
youtube.com/user/Praxxus55712
youtube.com/user/howtovideobykartik
youtube.com/user/HolmesPlacePt
youtube.com/user/xafurdariaoficial
youtube.com/user/TheMegaFakerChannel
youtube.com/user/thekoalitiontv
youtube.com/user/ferlozan123
youtube.com/user/canalcuboX
youtube.com/user/AZZDINGUE
youtube.com/user/Theshweetlife
youtube.com/user/himeesh1
youtube.com/user/DubaiExpo2020
youtube.com/user/DugunDernek
youtube.com/user/iBeShucks
youtube.com/user/fafinettex3
youtube.com/user/WorldSeriesBoxing
youtube.com/user/movieplayerJP
youtube.com/user/wotakufighter2121
youtube.com/user/XShadowNekoX3
youtube.com/user/riserecords
youtube.com/user/Drollercaster
youtube.com/user/StarsTeamDubLi
youtube.com/user/elarrayanpv
youtube.com/user/thecreativeone
youtube.com/user/cgshanel
youtube.com/user/MereTeresaPGM
youtube.com/user/wa83n3eshh
youtube.com/user/rjgaltieri79
youtube.com/user/mileyofficialonline
youtube.com/user/Powerexplosive
youtube.com/user/DaGeniusLab
youtube.com/user/trailersyestrenos
youtube.com/user/bsalabao