Iranian military parade shows stealth missiles, high-speed torpedoes, Lightning fighters - is it all true?

It's not surprising that some of them are real. One thing to recognize is that Iran arguably has the best technology in the Islamic world. That's the result of sanctions. Sanctions aren't really necessarily a bad thing, at least they're a good thing for spontaneous industrial tech capability. China's current industrial base owes a lot to past sanctions. India has not been subject to any sanctions in the past, everything can be bought, what is the result, is what weapons are not good, can not be built. Sanctions you, you do not have to use, but you have to use, the only way is to build their own, even if it is much worse, or can be used, invariably their own industrial base will be established. That's how it works.