There are multiple views on who the Aryans were and where they came from. I am posting this video because it is interesting and much of it is probably true, or true enough. I prefer learning about Central Asia and ancient history much more than who the Aryans were or what the term really means. I am very open to other ideas on this general topic, especially the history of Central Asia, and welcome suggestions of relevant resources. My guess is the above video need not be titled The First Aryans, which is probably a mild kind of clickbait. The invention of the war chariot around 2000 BCE, though, was a really big deal and it probably did arise in that area. Chariots were hard to make and required a large array of supporting skilled workers, including horse breeders and trainers, carpenters, and warriors capable of using chariots to good effect. This is why the war chariot remained a dominant weapon for about 1000 years and why Central Asian peoples had massive influence on all of the settled cultures bordering Central Asia. It was not a simple thing for other societies to copy the war chariot and learn to use it. ABN