The serial number censorship is one of those weird traditions of PLA, one that stems from bureaucracy. Long story short, people don't want to be blamed for not keeping a secret and 保密 is a big requirement, at least back in the days, so when things get released to the public, they censor as much as possible to avoid causing trouble. For example, they'd refer to QBZ191 as "the new rifle" instead of naming it even tho everyone and their moms know what the rifle is. A even worse example of this is some military news reporting from PLA that I've seen around 2017ish that censors the QBZ-95-1 in their pictures since that is "not keeping a secret."
Anyways it is pretty stupid and stems out of the outdated conceptions of how 保密 works, don't need to look more into it. The PLA is changing significantly with how they portray themselves and their equipments in the media, and things are a lot more open than before, but it takes time for people to change. The fact that they half-assed the censorship of the serial number in this video tells you as much as you need to know about this norm.
Anyways, from the video, I think the rifle functions great! You can use the trigger finger to drop the magazine, that is great (we already know this from 2019 but nice to see it in action)! The recoil seems to be pretty minimal, because QBZ-95 does have a bit of a kick from all the videos I've seen. QBZ191 seems to be very controllable on full-auto, which is good, because that actually will make full-auto viable.
Personally, I'm not a huge fan of fast fire rate on guns that fire bullets that are more powerful than pistol calibers, a moderate 500 - 700 RPM will make the recoil impulse much more manageable and give you a bit longer time for sustained fire compared to 850 - 1000 RPM guns. It's the shots that hit that count, so reducing the fire rate by a bit and make it a bit easier to control is the way to go, at least in my opinion. Because after all, you'd not be using full auto much anyways unless you're shooting at targets within 50m.
