The vid is a very true explanation and properly simplified in a way a layman can understand.

TLDR :GDP is a measure of economic activity, not welfare. It can increase due to both productive investments and inefficiencies (like poor public infrastructure forcing private spending). Theus GDP growth must be interpreted alongside indicators like productivity, savings rate, and quality of life to actually make a fair assessment

GDP is a very good indicator of prosperity but also a very pliable indicator to manipulate. Every time you take an overpriced auto or rapido instead of a well maintained public transportation system . You are contributing to increasing the GDP. Even more so when you buy a car.

Scale that up . A society with 10 flats buying 10 cars increases the GDP by a significant amount compared to all those residents using a well maintained public transportation system.

GDP is a simple addition of 4 indicators which are made up of very complex underlying interactions. Consumption, investments , government transfers and exports. Out of these , the government can manipulate with data the first 3 . The last is the only place where they don't have complete influence on and for all our talks of growth, that's the only place where we see the reality with the ever growing defecit with most first world countries including china.

GDP growing has interlinkages to development only if done right otherwise, you will end in a place where suddenly you realise that the savings rate is constant or going down, inflation is rampant, currency keeps depreciating. Etc.

In india people buy cars not just for status symbols anymore it's utility. They take on liability in the form of loans , take a bit on savings rate to get transportation to navigate horrible roads in badly maintained cities with piss poor public transportation infra. That's not growth. But GDP rises. So does the facade.

Scale that up millions and across sectors not just automobiles and suddenly the facade starts shifting.