There are many many YouTube channels but channels I have followed were:
- PHYSICS: Physics Galaxy And Physics Wallah
- CHEMISTRY: IITians Explain and Pankaj sir chemistry
- BIOLOGY: Biomentors and Ozone classes and for tricks you can refer to kV Education
***** Please try not to attend any live classes on YouTube they totally useless if you are seriously targeting neet bcoz most of the live classes are just to sell their promo codes nothing else and if there are some serious ones they also take 2hr time for the content which can be covered in just 40–45 min
Live classes are not bad but with time constraint u should avoid them( my opinion)