This video explains the following topics in detail:
REAL GDP;
NOMINAL GDP;
THEIR DETERMINATION;
GDP as WELFARE.

Links of all the previous parts is given below 👇
Part 1 https://youtu.be/978AeEKFG1o
Part 2 https://youtu.be/fs9n0HHLUI4
Part 3 https://youtu.be/DCdSPRSd0Ek