It is more of a propaganda than promotional video.
Who buys fighter jets. It will be a country's air-force. Common people like you and me don't decide on any thing.
Air-Force while buying looks at technical specification in detail and how the platform will satisfy/fulfill its needs.
Governments looks at the political/diplomatic capital the purchase will bring.
Neither of these two bodies are affected by such videos.
I know that when Buying any kind of Fighter Aircraft, that respective Airforce will look at the technical specifications and see if the Aircraft Specifications Fullfils their Requirement criteria and for a government, buying Aircrafts comes with a political/Diplomatic blessings but if we want to Export any type of product we need to also improve on our marketing strategy. That is what I am trying to stress on.
Have you looked at the promotional videos of SAAB, Boeing, Lockheed Martin etc promoting their various products? We too need that. I won't be considering that Propoganda.
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We are also selling Tejas in future. Its up to ADA and DRDO to get these weapon system operational before sale has been competed.
Hopefully these Weopons are developed on Time. Best wishes to ADA and DRDO in Developments.