I'm subscribed to a bunch of channels that stream races, some do more often some less.
FIA WEC -
https://www.youtube.com/channel/UCwU7U7PiarcJKLjDJTnANjw
Endurance Championship, GTs and Prototypes.
NISMO TV -
https://www.youtube.com/channel/UCaTxfj0BzL-MaCy-YUqPRoQ
They stream the Super GT with english commentary, The Blancpain races and the Micra cup.
Goodwood Road & Racing -
https://www.youtube.com/channel/UC8rador8CU-pTJ6p7WNiv6w
They stream the Goodwood festival every year, nice videos and some other races with classics.
DTM -
https://www.youtube.com/channel/UCwKq447rYMVI5dAQWMmFnfg
DTM, if we're lucky we could see a german-japanese race war here, or maybe on the NISMO channel
EuroNASCAR -
https://www.youtube.com/channel/UCBC6q0W_XvlektRSbjJ4mgg
Yuros running on circles.
Lamborghini squadra corse -
https://www.youtube.com/channel/UCO2SBo6hz0FewMjl6n5Md-Q
One make Lambo races
TheBRSCC -
https://www.youtube.com/channel/UCu8lvaSxDVWB5sLu-ovw1Ig
A variety of grassroots races in The UK, Fiesta cup, Formula 1000 etc.
NASCAR -
https://www.youtube.com/user/TheOfficialNASCAR
The real one, not some ripoff where you don't know any of the drivers.
WorldChallengeTV -
https://www.youtube.com/channel/UC-e9dmYdrviwJ5J891mLhQg
Pirelli world challenge. Beware, Panoz.
GTWorld -
https://www.youtube.com/channel/UC-yHapH6mW1ceZ_5PDUf1_g
The world of GT
TCR TV -
https://www.youtube.com/channel/UCoSlmLSprEnTz7HjmMb7HBw
What science has done to the group A.
GT4 European Series -
https://www.youtube.com/channel/UCLKDc9r7EjOtfOpytVbpDyg
Don't let them trick you, it's not actually Gran Turismo 4.
World Series Formula V8 -
https://www.youtube.com/channel/UCEpH8fOdf2YX9R-3Gh3iXRg
The most American open wheelers
Indycar -
https://www.youtube.com/channel/UCy1F61QvUUQXAXi2Voa_fUw
The least American Open wheelers
Super Takyu TV -
https://www.youtube.com/channel/UC8sfQKfk_4_JePSHSupvT4w
They stream the Super Yakyu, I don't understand what the fuck they're talking about but I'm here for the cars.
I have more if you want.