Here are some alternatives for Youtube!

Piped:
https://piped.video/
https://piped.kavin.rocks/

https://github.com/TeamPiped/Piped/wiki/Instances - INSTANCES

Here's the list here too:
Instance Name	Instance API URL	Instance Location(s)	CDN	Registered Users
kavin.rocks (Official)	https://pipedapi.kavin.rocks	🇺🇸, 🇮🇳, 🇳🇱, 🇨🇦, 🇬🇧, 🇫🇷	Yes	
tokhmi.xyz	https://pipedapi.tokhmi.xyz	🇺🇸	Yes	
moomoo.me	https://pipedapi.moomoo.me	🇬🇧	Yes	
syncpundit.io	https://pipedapi.syncpundit.io	🇺🇸, 🇮🇳, 🇬🇧, 🇯🇵	Yes	
mha.fi	https://api-piped.mha.fi	🇫🇮	Yes	
garudalinux.org	https://piped-api.garudalinux.org	🇫🇮	Yes	
rivo.lol	https://pipedapi.rivo.lol	🇨🇱	Yes	
leptons.xyz	https://pipedapi.leptons.xyz	🇦🇹	Yes	
lunar.icu	https://piped-api.lunar.icu	🇩🇪	Yes	
dc09.ru	https://ytapi.dc09.ru	🇷🇺	Yes	
colinslegacy.com	https://pipedapi.colinslegacy.com	🇺🇸	Yes	
vyper.me	https://yapi.vyper.me	🇨🇱	Yes	
looleh.xyz	https://api.looleh.xyz	🇳🇱	Yes	
cfe.re	https://piped-api.cfe.re	🇵🇱	Yes	
r4fo.com	https://pipedapi.r4fo.com	🇩🇪	Yes	
darkness.services	https://pipedapi.darkness.services	🇺🇸	Yes	
kavin.rocks libre (Official)	https://pipedapi-libre.kavin.rocks	🇳🇱	No	
mint.lgbt	https://pa.mint.lgbt	🇨🇦	No	
il.ax	https://pa.il.ax	🇺🇸	No	
privacy.com.de	https://piped-api.privacy.com.de	🇩🇪	No	
projectsegfau.lt	https://api.piped.projectsegfau.lt	🇫🇷	No	
projectsegfau.lt in	https://pipedapi.in.projectsegfau.lt	🇮🇳	No	
projectsegfau.lt us	https://pipedapi.us.projectsegfau.lt	🇺🇸	No	
whatever.social	https://watchapi.whatever.social	🇺🇸	No	
privacydev.net	https://api.piped.privacydev.net	🇫🇷	No	
palveluntarjoaja.eu	https://pipedapi.palveluntarjoaja.eu	🇫🇷	No	
smnz.de	https://pipedapi.smnz.de	🇩🇪	No	
adminforge.de	https://pipedapi.adminforge.de	🇩🇪	No	
qdi.fi	https://pipedapi.qdi.fi	🇺🇸	No	
hostux.net	https://piped-api.hostux.net	🇫🇷, 🇱🇺	No	
vern.cc	https://pdapi.vern.cc	🇺🇸	No	
pfcd.me	https://pipedapi.pfcd.me	🇩🇪	No	
frontendfriendly.xyz	https://pipedapi.frontendfriendly.xyz	🇺🇸	No	
piped.yt	https://api.piped.yt	🇩🇪	No	
astartes.nl	https://pipedapi.astartes.nl	🇳🇱	No	
osphost.fi	https://pipedapi.osphost.fi	🇫🇮	No	
simpleprivacy.fr	https://pipedapi.simpleprivacy.fr	🇫🇷	No	
drgns.space	https://pipedapi.drgns.space	🇺🇸	No	
ggtyler.dev	https://piapi.ggtyler.dev	🇺🇸	No	
pluto.lat	https://api.watch.pluto.lat	🇫🇮	No	
seitan-ayoub.lol	https://piped-backend.seitan-ayoub.lol	🇩🇪	No	
owo.si	https://pipedapi.owo.si	🇩🇪	No	
minionflo.net	https://api.piped.minionflo.net	🇩🇪	No	
nezumi.party	https://pipedapi.nezumi.party	🇮🇹	No	
ducks.party	https://pipedapi.ducks.party	🇳🇱	No	
ngn.tf	https://pipedapi.ngn.tf	🇹🇷	No	
coldforge.xyz	https://pipedapi.coldforge.xyz	🇺🇸	No	
codespace.cz	https://piped-api.codespace.cz	🇨🇿	No	
reallyaweso.me	https://pipedapi.reallyaweso.me	🇩🇪	No	
phoenixthrush.com	https://pipedapi.phoenixthrush.com	🇩🇪	No	
private.coffee	https://api.piped.private.coffee	🇦🇹	No	
ehwurscht.at	https://schaunapi.ehwurscht.at	🇦🇹	No	
dedyn.io	https://pipedapi.dedyn.io	🇩🇪	No	
nosebs.ru	https://pipedapi.nosebs.ru	🇫🇮	No	

Invidious:
https://docs.invidious.io/instances/ - INSTANCES
https://api.invidious.io/ - INSTANCES API

Here's the list here too (I've added some small notes):
https://inv.in.projectsegfau.lt 🇮🇳 [Project Segfault]
https://inv.nadeko.net 🇨🇱 [black]
https://inv.tux.pizza 🇺🇸 [tux.pizza]
https://inv.us.projectsegfau.lt 🇺🇸 [Project Segfault]
https://invidious.darkness.services 🇺🇸 [Darkness Services]
https://invidious.drgns.space 🇺🇸
https://invidious.einfachzocken.eu 🇩🇪 [einfachzocken]
https://invidious.fdn.fr 🇫🇷
https://invidious.flokinet.to 🇷🇴
https://invidious.incogniweb.net 🇺🇸 [incogniweb.net]
https://invidious.jing.rocks 🇯🇵
https://invidious.lunar.icu 🇩🇪 (uses Cloudflare) [Maximilian Stumpf]
https://invidious.materialio.us 🇳🇿
https://invidious.perennialte.ch 🇦🇺 (uses Cloudflare) [perennialte.ch]
https://invidious.privacydev.net 🇫🇷
https://invidious.privacyredirect.com 🇫🇮 [privacyredirect]
https://invidious.reallyaweso.me 🇩🇪
https://invidious.private.coffee 🇦🇹 [private.coffee]
https://invidious.protokolla.fi 🇩🇪
https://invidious.yourdevice.ch 🇩🇪
https://iv.datura.network 🇫🇮 [Datura Network]
https://iv.ggtyler.dev 🇺🇸 [Tyler]
https://iv.melmac.space 🇩🇪 [Gordon and Lucky]
https://iv.nboeck.de 🇩🇪 [Youtube blocking]
https://vid.puffyan.us 🇺🇸
https://yewtu.be 🇩🇪 - Source code/changes: https://github.com/yewtudotbe/invidious-custom
https://yt.artemislena.eu 🇩🇪 [Registrations closed]
https://yt.cdaut.de 🇩🇪 [No feed]
https://yt.drgnz.club 🇨🇿 [DrgnzClub]

Clipzag:
https://clipzag.com/

video.link:
https://video.link/

https://yout-ube.com