Hello Saurabh, 

Your question is not much clear but if you are pursuing B. Tech and you want to know about the different you tubers who reach B. Tech course then it would be best to find individual topic on you tube and then search for the top rated video to watch it further. 

You can also visit NPTEL website to avail various course facilities. 

If your doubt was not cleared then make sure you contact us again in the comment section given below. 

All the best.