Since this is a forum about China, we should be contributing more Chinese perspective to this conflict. While many think that the current conflict resembles the Soviet-Finnish War, it is possible that this conflict will become Russia's Battle of Khalkhin Gol of 21st century. Prior to the battle, Soviets believed that their new Deep Battle Doctrine along with a large mechanized/air force would result in a quick victory. However, the battle dragged on, and was only won by Soviets after heavy losses. It revealed Soviet weakness in tactical command and its officer corps, and general deficiencies in combat effectiveness. Likewise, Nazi Germany suffered signification losses of almost 20,000 troops during the invasion of (half of) Poland, and its war plans were severely disrupted by fierce resistance from several Poland strongholds and cities - many of them did not fall until the general surrender of Polish army. In fact, Polish resistance in the East was only destroyed by the Soviet forces entering the war from their rear.
One interesting aspect of the war is that Ukrainians were still able to be fairly combat effective despite having its line of command being effectively cut off, by utilizing personal initiative of local commanders and NATO intelligence. This is atypical of high-tech informational warfare, where the emphasis is that every element could collect and receive realtime battle information, allowing HQ to visualize every minute detail of the battle space and issue commands like a RTS game. In Ukraine, it's the exact opposite: NATO merely provides intelligence, and it takes each local commander's own initiative to make use of the intelligence and organize attacks. The video calls this type of distributed warfare "Didi (or Uber) warfare." This "local network" tactic requires only a personal terminal (ie. smartphone) to collect/receive realtime intelligence and make decision based on it. It could potentially evolve to be a new method of guerrila warfare for the modern era, and is currently being investigated by PLA researchers. Hopefully PLA could either apply it to their own doctrine or devise a counter.
More importantly though, it is obvious that both Russia and Ukraine are incapable of waging large scale high-tech informational war. True large-scale informational war between peer opponents have not yet materialized - everyone is still fighting 20th century war with 21st century weapons. We have seen nations waging small scale 21st century high-tech war against weaker opponents (Russia-Ukraine in 2014, Syria, Azerbaijan-Armenia etc.). But once the war scales up to multiple Corps-level confrontation, Russia had to resort to Cold War era warfare due to the lack of adequately trained troops and equipment. Actually, in this regard, it can be seen that from logistics to unit manuvers, the current Russian army is even worse than the Soviet Army 40 years ago. In essence, this war has revealed a lot of drawbacks which the Russians must fix, and also unveiled insights for the war of the future.
