You can search on google as Ashish Surana You Tube Videos,

Surana Engineering Classes, Nasik

You can also watch M2, BEE etc.

You should visit mohit tyagi videos for maths.
That's awesome

I will refer you online sites which provide good video notes and lectures for math studies.
You can refer to:
edx.org
freevideolectures.com
academicearth.org
NPTEL videos

It shall help you with online guidance and concept clearance.

Good luck.