@107jm I do not know. The S-300 family is so big that I can't say technical data from my mind. If this is PMU likely it has different burn time and engine designe the the firs missile variant.
@purpleravenstar Maybe US should resolve quality problem of it's Patriot system.It has almost as much failures as successes in test phase and it was still accepted into service.Here you see one failure out of 100 various S-300 test videos and straight away you assume how inefficient system is,lol.Everyone knows that in training you would use oldest missiles you got in stock and S-300 has been around for a while.
There is not technology that 100% fail safe. IMHO it is quite idiotic things say that "this is crap" or similar things. You can find similar videos about USA or European stuiff too. BTW the most interesting fact in the video the long engine burn time. The original S-300's missile burn time was about 8-9 sec. This had much longer.
I just see some little Chinese guy on the ground behind the launch trailer with an X-Box controller saying to himself- Ohhhh yeah....I have been waiting a long time for THIS A**holes!!
I hope all the spectators were in a bunker of some sort especially the person shooting the video...Missiles like that are going to produce some mighty big chunks of metal after they go ka-boom.